diff --git a/kernel/api/av.go b/kernel/api/av.go
index d9a20c275..68ef65702 100644
--- a/kernel/api/av.go
+++ b/kernel/api/av.go
@@ -17,6 +17,7 @@
 package api
 
 import (
+	"fmt"
 	"net/http"
 
 	"github.com/88250/gulu"
@@ -27,6 +28,24 @@ import (
 	"github.com/siyuan-note/siyuan/kernel/util"
 )
 
+func getUnusedAttributeViews(c *gin.Context) {
+	ret := gulu.Ret.NewResult()
+	defer c.JSON(http.StatusOK, ret)
+
+	unusedAttributeViews := model.UnusedAttributeViews()
+	total := len(unusedAttributeViews)
+
+	const maxUnusedAttributeViews = 512
+	if total > maxUnusedAttributeViews {
+		unusedAttributeViews = unusedAttributeViews[:maxUnusedAttributeViews]
+		util.PushMsg(fmt.Sprintf(model.Conf.Language(251), total, maxUnusedAttributeViews), 5000)
+	}
+
+	ret.Data = map[string]interface{}{
+		"unusedAttributeViews": unusedAttributeViews,
+	}
+}
+
 func getAttributeViewItemIDsByBoundIDs(c *gin.Context) {
 	ret := gulu.Ret.NewResult()
 	defer c.JSON(http.StatusOK, ret)
diff --git a/kernel/api/outline.go b/kernel/api/outline.go
index 83c35c6e3..5530720ee 100644
--- a/kernel/api/outline.go
+++ b/kernel/api/outline.go
@@ -44,6 +44,10 @@ func getDocOutline(c *gin.Context) {
 	}
 
 	rootID := arg["id"].(string)
+	if util.InvalidIDPattern(rootID, ret) {
+		return
+	}
+
 	headings, err := model.Outline(rootID, preview)
 	if err != nil {
 		ret.Code = 1
diff --git a/kernel/api/router.go b/kernel/api/router.go
index 2b03ea394..0865f08d9 100644
--- a/kernel/api/router.go
+++ b/kernel/api/router.go
@@ -489,6 +489,7 @@ func ServeAPI(ginServer *gin.Engine) {
 	ginServer.Handle("POST", "/api/av/getAttributeViewAddingBlockDefaultValues", model.CheckAuth, getAttributeViewAddingBlockDefaultValues)
 	ginServer.Handle("POST", "/api/av/getAttributeViewBoundBlockIDsByItemIDs", model.CheckAuth, getAttributeViewBoundBlockIDsByItemIDs)
 	ginServer.Handle("POST", "/api/av/getAttributeViewItemIDsByBoundIDs", model.CheckAuth, getAttributeViewItemIDsByBoundIDs)
+	ginServer.Handle("POST", "/api/av/getUnusedAttributeViews", model.CheckAuth, getUnusedAttributeViews)
 
 	ginServer.Handle("POST", "/api/ai/chatGPT", model.CheckAuth, model.CheckAdminRole, chatGPT)
 	ginServer.Handle("POST", "/api/ai/chatGPTWithAction", model.CheckAuth, model.CheckAdminRole, chatGPTWithAction)
diff --git a/kernel/model/attribute_view.go b/kernel/model/attribute_view.go
index dd8290a60..1f9066a8e 100644
--- a/kernel/model/attribute_view.go
+++ b/kernel/model/attribute_view.go
@@ -38,12 +38,108 @@ import (
 	"github.com/siyuan-note/siyuan/kernel/av"
 	"github.com/siyuan-note/siyuan/kernel/cache"
 	"github.com/siyuan-note/siyuan/kernel/filesys"
+	"github.com/siyuan-note/siyuan/kernel/search"
 	"github.com/siyuan-note/siyuan/kernel/sql"
 	"github.com/siyuan-note/siyuan/kernel/treenode"
 	"github.com/siyuan-note/siyuan/kernel/util"
 	"github.com/xrash/smetrics"
 )
 
+func UnusedAttributeViews() (ret []string) {
+	defer logging.Recover()
+	ret = []string{}
+
+	allAvIDs, err := getAllAvIDs()
+	if err != nil {
+		return
+	}
+
+	referencedAvIDs := map[string]bool{}
+	luteEngine := util.NewLute()
+	boxes := Conf.GetBoxes()
+	for _, box := range boxes {
+		pages := pagedPaths(filepath.Join(util.DataDir, box.ID), 32)
+		for _, paths := range pages {
+			var trees []*parse.Tree
+			for _, localPath := range paths {
+				tree, loadTreeErr := loadTree(localPath, luteEngine)
+				if nil != loadTreeErr {
+					continue
+				}
+				trees = append(trees, tree)
+			}
+			for _, tree := range trees {
+				for _, id := range getAvIDs(tree, allAvIDs) {
+					referencedAvIDs[id] = true
+				}
+			}
+		}
+	}
+
+	templateAvIDs := search.FindAllMatchedTargets(filepath.Join(util.DataDir, "templates"), allAvIDs)
+	for _, id := range templateAvIDs {
+		referencedAvIDs[id] = true
+	}
+
+	for _, id := range allAvIDs {
+		if !referencedAvIDs[id] {
+			ret = append(ret, id)
+		}
+	}
+
+	ret = gulu.Str.RemoveDuplicatedElem(ret)
+	return
+}
+
+func getAvIDs(tree *parse.Tree, allAvIDs []string) (ret []string) {
+	ast.Walk(tree.Root, func(n *ast.Node, entering bool) ast.WalkStatus {
+		if !entering {
+			return ast.WalkContinue
+		}
+
+		if ast.NodeAttributeView == n.Type {
+			ret = append(ret, n.AttributeViewID)
+		}
+
+		for _, kv := range n.KramdownIAL {
+			ids := util.GetContainsSubStrs(kv[1], allAvIDs)
+			if 0 < len(ids) {
+				ret = append(ret, ids...)
+			}
+		}
+
+		return ast.WalkContinue
+	})
+
+	ret = gulu.Str.RemoveDuplicatedElem(ret)
+	return
+}
+
+func getAllAvIDs() (ret []string, err error) {
+	ret = []string{}
+
+	entries, err := os.ReadDir(filepath.Join(util.DataDir, "storage", "av"))
+	if nil != err {
+		return
+	}
+
+	for _, entry := range entries {
+		name := entry.Name()
+		if !strings.HasSuffix(name, ".json") {
+			continue
+		}
+
+		id := strings.TrimSuffix(name, ".json")
+		if !ast.IsNodeIDPattern(id) {
+			continue
+		}
+
+		ret = append(ret, id)
+	}
+	ret = gulu.Str.RemoveDuplicatedElem(ret)
+	return
+}
+
 func GetAttributeViewItemIDs(avID string, blockIDs []string) (ret map[string]string) {
 	ret = map[string]string{}
 	for _, blockID := range blockIDs {
diff --git a/kernel/model/tree.go b/kernel/model/tree.go
index 06bce454b..9b69cfa32 100644
--- a/kernel/model/tree.go
+++ b/kernel/model/tree.go
@@ -17,17 +17,13 @@
 package model
 
 import (
-	"bufio"
-	"bytes"
 	"errors"
 	"fmt"
 	"io/fs"
 	"os"
 	"path"
 	"path/filepath"
-	"runtime"
 	"strings"
-	"sync"
 	"time"
 
 	"github.com/88250/lute"
@@ -38,6 +34,7 @@ import (
 	"github.com/siyuan-note/logging"
 	"github.com/siyuan-note/siyuan/kernel/av"
 	"github.com/siyuan-note/siyuan/kernel/filesys"
+	"github.com/siyuan-note/siyuan/kernel/search"
 	"github.com/siyuan-note/siyuan/kernel/sql"
 	"github.com/siyuan-note/siyuan/kernel/task"
 	"github.com/siyuan-note/siyuan/kernel/treenode"
@@ -317,7 +314,7 @@ func findUnindexedTreePathInAllBoxes(id string) (ret string) {
 	boxes := Conf.GetBoxes()
 	for _, box := range boxes {
 		root := filepath.Join(util.DataDir, box.ID)
-		paths := findAllOccurrences(root, id)
+		paths := search.FindAllMatchedPaths(root, []string{id})
 		var rootIDs []string
 		rootIDPaths := map[string]string{}
 		for _, p := range paths {
@@ -335,88 +332,3 @@ func findUnindexedTreePathInAllBoxes(id string) (ret string) {
 	}
 	return
 }
-
-func findAllOccurrences(root string, target string) []string {
-	if root == "" || target == "" {
-		return nil
-	}
-
-	searchBytes := []byte(target)
-	jobs := make(chan string, 256)    // 任务通道
-	results := make(chan string, 256) // 结果通道
-
-	// 用于等待所有 Worker 完成
-	var wg sync.WaitGroup
-	// 用于等待结果收集器完成
-	var collectWg sync.WaitGroup
-
-	// 1. 启动结果收集协程
-	var matchedPaths []string
-	collectWg.Add(1)
-	go func() {
-		defer collectWg.Done()
-		for path := range results {
-			matchedPaths = append(matchedPaths, path)
-		}
-	}()
-
-	// 2. 启动并发 Worker Pool (基于 CPU 核心数)
-	numWorkers := runtime.NumCPU()
-	for i := 0; i < numWorkers; i++ {
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			for path := range jobs {
-				if containsTarget(path, searchBytes) {
-					results <- path
-				}
-			}
-		}()
-	}
-
-	// 3. 遍历文件夹并分发任务
-	_ = filepath.WalkDir(root, func(path string, d os.DirEntry, err error) error {
-		if err == nil && d.Type().IsRegular() {
-			jobs <- path
-		}
-		return nil
-	})
-
-	// 4. 关闭通道并等待结束
-	close(jobs)      // 停止分发任务
-	wg.Wait()        // 等待所有 Worker 处理完
-	close(results)   // 停止收集结果
-	collectWg.Wait() // 等待切片组装完成
-
-	return matchedPaths
-}
-
-// containsTarget 针对大文件优化的字节流匹配函数
-func containsTarget(path string, target []byte) bool {
-	f, err := os.Open(path)
-	if err != nil {
-		return false
-	}
-	defer f.Close()
-
-	// 1MB 缓冲区
-	reader := bufio.NewReaderSize(f, 1024*1024)
-	for {
-		// 使用 ReadSlice 实现零拷贝读取
-		line, err := reader.ReadSlice('\n')
-		if len(line) > 0 && bytes.Contains(line, target) {
-			return true
-		}
-		if err != nil {
-			if err == bufio.ErrBufferFull {
-				// 处理超过 1MB 的超长行，直接跳过当前行剩余部分
-				for err == bufio.ErrBufferFull {
-					_, err = reader.ReadSlice('\n')
-				}
-				continue
-			}
-			break // EOF 或其他错误
-		}
-	}
-	return false
-}
diff --git a/kernel/search/find.go b/kernel/search/find.go
new file mode 100644
index 000000000..104889e79
--- /dev/null
+++ b/kernel/search/find.go
@@ -0,0 +1,225 @@
+// SiYuan - Refactor your thinking
+// Copyright (c) 2020-present, b3log.org
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Affero General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU Affero General Public License for more details.
+//
+// You should have received a copy of the GNU Affero General Public License
+// along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+package search
+
+import (
+	"bytes"
+	"io"
+	"os"
+	"path/filepath"
+	"runtime"
+	"sync"
+)
+
+type Match struct {
+	Path   string
+	Target string
+}
+
+func FindAllMatchedPaths(root string, targets []string) []string {
+	matches := FindAllMatches(root, targets)
+	return pathsFromMatches(matches)
+}
+
+func FindAllMatchedTargets(root string, targets []string) []string {
+	matches := FindAllMatches(root, targets)
+	return targetsFromMatches(matches)
+}
+
+// FindAllMatches 遍历 root 下的文件，返回所有命中的结果（文件路径 + 命中目标）
+// targets 为空或 root 为空时返回 nil
+func FindAllMatches(root string, targets []string) []Match {
+	if root == "" || len(targets) == 0 {
+		return nil
+	}
+
+	// 构建基于首字节的模式索引，并计算最长模式长度
+	patternIndex := make(map[byte][][]byte)
+	var maxLen int
+	for _, t := range targets {
+		if t == "" {
+			continue
+		}
+		b := []byte(t)
+		if len(b) > maxLen {
+			maxLen = len(b)
+		}
+		patternIndex[b[0]] = append(patternIndex[b[0]], b)
+	}
+	if len(patternIndex) == 0 {
+		return nil
+	}
+
+	jobs := make(chan string, 256)
+	results := make(chan Match, 256)
+
+	var wg sync.WaitGroup
+	var collectWg sync.WaitGroup
+
+	var matches []Match
+	collectWg.Add(1)
+	go func() {
+		defer collectWg.Done()
+		for m := range results {
+			matches = append(matches, m)
+		}
+	}()
+
+	numWorkers := runtime.NumCPU()
+	for i := 0; i < numWorkers; i++ {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			for p := range jobs {
+				hits := scanFileForTargets(p, patternIndex, maxLen)
+				if len(hits) > 0 {
+					for _, t := range hits {
+						results <- Match{Path: p, Target: t}
+					}
+				}
+			}
+		}()
+	}
+
+	_ = filepath.WalkDir(root, func(path string, d os.DirEntry, err error) error {
+		if err == nil && d.Type().IsRegular() {
+			jobs <- path
+		}
+		return nil
+	})
+
+	close(jobs)
+	wg.Wait()
+	close(results)
+	collectWg.Wait()
+	return matches
+}
+
+// scanFileForTargets 在文件中流式搜索所有目标（基于首字节索引），返回去重后的命中目标字符串列表
+func scanFileForTargets(path string, patternIndex map[byte][][]byte, maxLen int) []string {
+	f, err := os.Open(path)
+	if err != nil {
+		return nil
+	}
+	defer f.Close()
+
+	// 构建字节位图，加速首字节检测
+	var bitmap [256]bool
+	for b := range patternIndex {
+		bitmap[b] = true
+	}
+
+	found := make(map[string]struct{})
+	buf := make([]byte, 64<<10) // 64KB
+	// 保留上一次块末尾的重叠数据以支持跨块匹配
+	var tail []byte
+
+	for {
+		n, err := f.Read(buf)
+		if n > 0 {
+			// data = tail + buf[:n]
+			data := make([]byte, len(tail)+n)
+			copy(data, tail)
+			copy(data[len(tail):], buf[:n])
+
+			// 扫描 data，查找任意候选首字节位置
+			i := 0
+			for i < len(data) {
+				// 快速跳过非候选字节
+				for i < len(data) && !bitmap[data[i]] {
+					i++
+				}
+				if i >= len(data) {
+					break
+				}
+				b := data[i]
+				// 对应首字节的所有模式进行校验
+				for _, pat := range patternIndex[b] {
+					pl := len(pat)
+					// 如果剩余字节不足以完全匹配，则交由下一轮（通过 tail 保证）
+					if i+pl <= len(data) {
+						if bytes.Equal(pat, data[i:i+pl]) {
+							found[string(pat)] = struct{}{}
+						}
+					}
+				}
+				i++
+			}
+
+			// 保留最后 maxLen-1 字节作为下一块的 tail（避免超长内存分配）
+			if maxLen <= 1 {
+				tail = nil
+			} else {
+				if len(data) >= maxLen-1 {
+					tail = append(tail[:0], data[len(data)-(maxLen-1):]...)
+				} else {
+					tail = append(tail[:0], data...)
+				}
+			}
+		}
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+			// 读取出错，返回已有结果
+			break
+		}
+	}
+
+	if len(found) == 0 {
+		return nil
+	}
+	res := make([]string, 0, len(found))
+	for k := range found {
+		res = append(res, k)
+	}
+	return res
+}
+
+// pathsFromMatches 从 Match 列表中返回去重的路径切片（保留首次出现顺序）
+func pathsFromMatches(ms []Match) []string {
+	if len(ms) == 0 {
+		return nil
+	}
+	seen := make(map[string]struct{})
+	paths := make([]string, 0)
+	for _, m := range ms {
+		if _, ok := seen[m.Path]; ok {
+			continue
+		}
+		seen[m.Path] = struct{}{}
+		paths = append(paths, m.Path)
+	}
+	return paths
+}
+
+// targetsFromMatches 从 Match 列表中返回去重的目标切片（保留首次出现顺序）
+func targetsFromMatches(ms []Match) []string {
+	if len(ms) == 0 {
+		return nil
+	}
+	seen := make(map[string]struct{})
+	targets := make([]string, 0)
+	for _, m := range ms {
+		if _, ok := seen[m.Target]; ok {
+			continue
+		}
+		seen[m.Target] = struct{}{}
+		targets = append(targets, m.Target)
+	}
+	return targets
+}
diff --git a/kernel/util/misc.go b/kernel/util/misc.go
index ddefcb08e..63151eb15 100644
--- a/kernel/util/misc.go
+++ b/kernel/util/misc.go
@@ -207,6 +207,15 @@ func ContainsSubStr(s string, subStrs []string) bool {
 	return false
 }
 
+func GetContainsSubStrs(s string, subStrs []string) (ret []string) {
+	for _, v := range subStrs {
+		if strings.Contains(s, v) {
+			ret = append(ret, v)
+		}
+	}
+	return
+}
+
 func ReplaceStr(strs []string, old, new string) (ret []string, changed bool) {
 	if old == new {
 		return strs, false