diff --git a/README.en-US.md b/README.en-US.md
index d71e6a8..2ff330a 100644
--- a/README.en-US.md
+++ b/README.en-US.md
@@ -391,7 +391,7 @@ jobs:
 | contents | Add [reaction](#reactions-types) for this comment | string | ✖ |
 | close-issue | Whether to close the issue at the same time | string | ✖ |
 
-- `duplicate-command`: When setting concise commands, while still supporting the original `Duplicate of`
+- `duplicate-command`: When setting concise commands, while still supporting the original `Duplicate of`. Block content contains `?`
 - `labels`: Highest priority
 - `close-issue`: Both `true` or `'true'` can take effect
 
diff --git a/README.md b/README.md
index 5d0a9e8..c7257dd 100644
--- a/README.md
+++ b/README.md
@@ -391,7 +391,7 @@ jobs:
 | contents | 为该评论的增加 [reaction](#reactions-types) | string | ✖ |
 | close-issue | 是否同时关闭该 issue | string | ✖ |
 
-- `duplicate-command`：当设置简洁命令时，同时仍支持原有 `Duplicate of`
+- `duplicate-command`：当设置简洁命令时，同时仍支持原有 `Duplicate of`。屏蔽内容包含 `?`
 - `labels`：优先级最高
 - `close-issue`：`true` 或 `'true'` 均可生效
 
diff --git a/dist/index.js b/dist/index.js
index 5fbe4ec..1a1657d 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -8042,7 +8042,7 @@ async function doMarkDuplicate (owner, repo, labels) {
 
   const ifCommandInput = !!duplicateCommand;
 
-  if ((ifCommandInput && commentBody.startsWith(duplicateCommand) && commentBody.split(' ')[0] == duplicateCommand) || testDuplicate(commentBody)) {
+  if (!commentBody.includes('?') && ((ifCommandInput && commentBody.startsWith(duplicateCommand) && commentBody.split(' ')[0] == duplicateCommand) || testDuplicate(commentBody))) {
     if (ifCommandInput) {
       const nextBody = commentBody.replace(duplicateCommand, 'Duplicate of');
       await doUpdateComment(owner, repo, commentId, nextBody, 'replace', true);
@@ -8074,7 +8074,7 @@ async function doMarkDuplicate (owner, repo, labels) {
       await doCloseIssue(owner, repo, issueNumber);
     }
   } else {
-    core.info(`This comment body should start whith 'duplicate-command'`);
+    core.info(`This comment body should start whith 'duplicate-command' or 'Duplicate of' and not include '?'`);
   }
 };
 
@@ -8732,7 +8732,7 @@ function matchKeyword (content, keywords) {
 
 function testDuplicate(body) {
   if (!body || !body.startsWith('Duplicate of')) {
-    return false
+    return false;
   }
 
   let arr = body.split(' ');
diff --git a/docs/base.en-US.md b/docs/base.en-US.md
index 0ba3e97..0f6a19b 100644
--- a/docs/base.en-US.md
+++ b/docs/base.en-US.md
@@ -265,7 +265,7 @@ jobs:
 | contents | Add [reaction](/en-US/guide/ref#-reactions-type) for this comment | string | ✖ |
 | close-issue | Whether to close the issue at the same time | string | ✖ |
 
-- `duplicate-command`: When setting concise commands, while still supporting the original `Duplicate of`
+- `duplicate-command`: When setting concise commands, while still supporting the original `Duplicate of`. Block content contains `?`
 - `labels`: Highest priority
 - `close-issue`: Both `true` or `'true'` can take effect
 
diff --git a/docs/base.md b/docs/base.md
index e1708b0..cb7a545 100644
--- a/docs/base.md
+++ b/docs/base.md
@@ -265,7 +265,7 @@ jobs:
 | contents | 为该评论的增加 [reaction](/guide/ref#-reactions-类型) | string | ✖ |
 | close-issue | 是否同时关闭该 issue | string | ✖ |
 
-- `duplicate-command`：当设置简洁命令时，同时仍支持原有 `Duplicate of`
+- `duplicate-command`：当设置简洁命令时，同时仍支持原有 `Duplicate of`。屏蔽内容包含 `?`
 - `labels`：优先级最高
 - `close-issue`：`true` 或 `'true'` 均可生效
 
diff --git a/src/base.js b/src/base.js
index 660537d..2d2a1bc 100644
--- a/src/base.js
+++ b/src/base.js
@@ -171,7 +171,7 @@ async function doMarkDuplicate (owner, repo, labels) {
 
   const ifCommandInput = !!duplicateCommand;
 
-  if ((ifCommandInput && commentBody.startsWith(duplicateCommand) && commentBody.split(' ')[0] == duplicateCommand) || testDuplicate(commentBody)) {
+  if (!commentBody.includes('?') && ((ifCommandInput && commentBody.startsWith(duplicateCommand) && commentBody.split(' ')[0] == duplicateCommand) || testDuplicate(commentBody))) {
     if (ifCommandInput) {
       const nextBody = commentBody.replace(duplicateCommand, 'Duplicate of');
       await doUpdateComment(owner, repo, commentId, nextBody, 'replace', true);
@@ -203,7 +203,7 @@ async function doMarkDuplicate (owner, repo, labels) {
       await doCloseIssue(owner, repo, issueNumber);
     }
   } else {
-    core.info(`This comment body should start whith 'duplicate-command'`);
+    core.info(`This comment body should start whith 'duplicate-command' or 'Duplicate of' and not include '?'`);
   }
 };
 
diff --git a/src/util.js b/src/util.js
index c728fc1..10c9b1a 100644
--- a/src/util.js
+++ b/src/util.js
@@ -31,7 +31,7 @@ function matchKeyword (content, keywords) {
 
 function testDuplicate(body) {
   if (!body || !body.startsWith('Duplicate of')) {
-    return false
+    return false;
   }
 
   let arr = body.split(' ');