diff --git a/app/src/protyle/util/paste.ts b/app/src/protyle/util/paste.ts
index 84ed0c757..dc6732127 100644
--- a/app/src/protyle/util/paste.ts
+++ b/app/src/protyle/util/paste.ts
@@ -169,8 +169,21 @@ export const pasteAsPlainText = async (protyle: IProtyle) => {
     if (localFiles.length === 0) {
         // Inline-level elements support pasted as plain text https://github.com/siyuan-note/siyuan/issues/8010
         navigator.clipboard.readText().then(textPlain => {
+            // 对一些内置需要解析的 HTML 标签进行内部转移 Improve sub/sup pasting as plain text https://github.com/siyuan-note/siyuan/issues/12155
+            textPlain = textPlain.replace(/<sub>/g, "__@sub@__").replace(/<\/sub>/g, "__@/sub@__");
+            textPlain = textPlain.replace(/<sup>/g, "__@sup@__").replace(/<\/sup>/g, "__@/sup@__");
+            textPlain = textPlain.replace(/<kbd>/g, "__@kbd@__").replace(/<\/kbd>/g, "__@/kbd@__");
+            textPlain = textPlain.replace(/<u>/g, "__@u@__").replace(/<\/u>/g, "__@/u@__");
+
             // 对 HTML 标签进行内部转义，避免被 Lute 解析以后变为小写 https://github.com/siyuan-note/siyuan/issues/10620
             textPlain = textPlain.replace(/</g, ";;;lt;;;").replace(/>/g, ";;;gt;;;");
+
+            // 反转义内置需要解析的 HTML 标签
+            textPlain = textPlain.replace(/__@sub@__/g, "<sub>").replace(/__@\/sub@__/g, "</sub>");
+            textPlain = textPlain.replace(/__@sup@__/g, "<sup>").replace(/__@\/sup@__/g, "</sup>");
+            textPlain = textPlain.replace(/__@kbd@__/g, "<kbd>").replace(/__@\/kbd@__/g, "</kbd>");
+            textPlain = textPlain.replace(/__@u@__/g, "<u>").replace(/__@\/u@__/g, "</u");
+
             const content = protyle.lute.BlockDOM2EscapeMarkerContent(protyle.lute.Md2BlockDOM(textPlain));
             // insertHTML 会进行内部反转义
             insertHTML(content, protyle, false, false, true);