diff --git a/app/src/boot/globalEvent/click.ts b/app/src/boot/globalEvent/click.ts
index e727f120c..f8f0a6594 100644
--- a/app/src/boot/globalEvent/click.ts
+++ b/app/src/boot/globalEvent/click.ts
@@ -41,7 +41,9 @@ export const globalClick = (event: MouseEvent & { target: HTMLElement }) => {
 
     const copyElement = hasTopClosestByClassName(event.target, "protyle-action__copy");
     if (copyElement) {
-        writeText(copyElement.parentElement.nextElementSibling.textContent.trimEnd());
+        let text = copyElement.parentElement.nextElementSibling.textContent.trimEnd()
+        text = text.replace(/\u00A0/g, " "); // Replace non-breaking spaces with normal spaces when copying https://github.com/siyuan-note/siyuan/issues/9382
+        writeText(text);
         showMessage(window.siyuan.languages.copied, 2000);
         event.preventDefault();
         return;
diff --git a/app/src/mobile/index.ts b/app/src/mobile/index.ts
index 0b37fe523..259b70321 100644
--- a/app/src/mobile/index.ts
+++ b/app/src/mobile/index.ts
@@ -64,7 +64,9 @@ class App {
             }
             const copyElement = hasTopClosestByClassName(event.target, "protyle-action__copy");
             if (copyElement) {
-                writeText(copyElement.parentElement.nextElementSibling.textContent.trimEnd());
+                let text = copyElement.parentElement.nextElementSibling.textContent.trimEnd()
+                text = text.replace(/\u00A0/g, " "); // Replace non-breaking spaces with normal spaces when copying https://github.com/siyuan-note/siyuan/issues/9382
+                writeText(text);
                 showMessage(window.siyuan.languages.copied, 2000);
                 event.preventDefault();
             }
diff --git a/app/src/protyle/export/index.ts b/app/src/protyle/export/index.ts
index d7e9ca2a4..bec8d4a1c 100644
--- a/app/src/protyle/export/index.ts
+++ b/app/src/protyle/export/index.ts
@@ -394,7 +394,9 @@ const renderPDF = (id: string) => {
                         return;
                     }
                 } else if (target.classList.contains("protyle-action__copy")) {
-                    navigator.clipboard.writeText(target.parentElement.nextElementSibling.textContent.trimEnd());
+                    let text = target.parentElement.nextElementSibling.textContent.trimEnd();
+                    text = text.replace(/\u00A0/g, " "); // Replace non-breaking spaces with normal spaces when copying https://github.com/siyuan-note/siyuan/issues/9382
+                    navigator.clipboard.writeText(text);
                     event.preventDefault();
                     event.stopPropagation();
                     break;
@@ -626,7 +628,9 @@ const onExport = (data: IWebSocketData, filePath: string, type: string, removeAs
     Protyle.plantumlRender(previewElement, "stage/protyle");
     document.querySelectorAll(".protyle-action__copy").forEach((item) => {
       item.addEventListener("click", (event) => {
-            navigator.clipboard.writeText(item.parentElement.nextElementSibling.textContent.trimEnd());
+            let text = item.parentElement.nextElementSibling.textContent.trimEnd();
+            text = text.replace(/\u00A0/g, " "); // Replace non-breaking spaces with normal spaces when copying
+            navigator.clipboard.writeText(text);
             event.preventDefault();
             event.stopPropagation();
       })
diff --git a/app/src/protyle/wysiwyg/index.ts b/app/src/protyle/wysiwyg/index.ts
index 4e03d597d..d3e2967b9 100644
--- a/app/src/protyle/wysiwyg/index.ts
+++ b/app/src/protyle/wysiwyg/index.ts
@@ -330,7 +330,9 @@ export class WYSIWYG {
             if (protyle.disabled) {
                 html = getEnableHTML(html);
             }
-            event.clipboardData.setData("text/plain", textPlain || protyle.lute.BlockDOM2StdMd(html).trimEnd());
+            textPlain = textPlain || protyle.lute.BlockDOM2StdMd(html).trimEnd();
+            textPlain = textPlain.replace(/\u00A0/g, " "); // Replace non-breaking spaces with normal spaces when copying https://github.com/siyuan-note/siyuan/issues/9382
+            event.clipboardData.setData("text/plain", textPlain);
             event.clipboardData.setData("text/html", protyle.lute.BlockDOM2HTML(html));
             event.clipboardData.setData("text/siyuan", html);
         });
@@ -1245,7 +1247,9 @@ export class WYSIWYG {
                 }
             }
             protyle.hint.render(protyle);
-            event.clipboardData.setData("text/plain", protyle.lute.BlockDOM2StdMd(html).trimEnd());  // 需要 trimEnd，否则 \n 会导致 https://github.com/siyuan-note/siyuan/issues/6218
+            let textPlain = protyle.lute.BlockDOM2StdMd(html).trimEnd(); // 需要 trimEnd，否则 \n 会导致 https://github.com/siyuan-note/siyuan/issues/6218
+            textPlain = textPlain.replace(/\u00A0/g, " "); // Replace non-breaking spaces with normal spaces when copying https://github.com/siyuan-note/siyuan/issues/9382
+            event.clipboardData.setData("text/plain", textPlain);
             event.clipboardData.setData("text/html", protyle.lute.BlockDOM2HTML(html));
             event.clipboardData.setData("text/siyuan", html);
         });