diff --git a/packages/client/src/tiptap/core/extensions/callout.ts b/packages/client/src/tiptap/core/extensions/callout.ts
index a3cc71e..a587b39 100644
--- a/packages/client/src/tiptap/core/extensions/callout.ts
+++ b/packages/client/src/tiptap/core/extensions/callout.ts
@@ -69,7 +69,7 @@ export const Callout = Node.create({
   addInputRules() {
     return [
       wrappingInputRule({
-        find: /^\$callout $/,
+        find: /^\$callout\$$/,
         type: this.type,
         getAttributes: (match) => {
           return { type: match[1] };
diff --git a/packages/client/src/tiptap/core/extensions/columns.ts b/packages/client/src/tiptap/core/extensions/columns.ts
index b3fd484..b2ceb7b 100644
--- a/packages/client/src/tiptap/core/extensions/columns.ts
+++ b/packages/client/src/tiptap/core/extensions/columns.ts
@@ -268,7 +268,7 @@ export const Columns = Node.create({
   addInputRules() {
     return [
       nodeInputRule({
-        find: /^\$columns $/,
+        find: /^\$columns\$$/,
         type: this.type,
         getAttributes: () => {
           return { type: 'left-right', columns: 2 };
diff --git a/packages/client/src/tiptap/core/extensions/countdown.ts b/packages/client/src/tiptap/core/extensions/countdown.ts
index 4e31730..0265261 100644
--- a/packages/client/src/tiptap/core/extensions/countdown.ts
+++ b/packages/client/src/tiptap/core/extensions/countdown.ts
@@ -78,7 +78,7 @@ export const Countdown = Node.create({
   addInputRules() {
     return [
       nodeInputRule({
-        find: /^\$countdown $/,
+        find: /^\$countdown\$$/,
         type: this.type,
         getAttributes: () => {
           return { width: '100%' };
diff --git a/packages/client/src/tiptap/core/extensions/excalidraw.ts b/packages/client/src/tiptap/core/extensions/excalidraw.ts
index 030d9bb..d36da5c 100644
--- a/packages/client/src/tiptap/core/extensions/excalidraw.ts
+++ b/packages/client/src/tiptap/core/extensions/excalidraw.ts
@@ -103,7 +103,7 @@ export const Excalidraw = Node.create({
   addInputRules() {
     return [
       nodeInputRule({
-        find: /^\$excalidraw $/,
+        find: /^\$excalidraw\$$/,
         type: this.type,
         getAttributes: () => {
           return { width: '100%' };
diff --git a/packages/client/src/tiptap/core/extensions/flow.ts b/packages/client/src/tiptap/core/extensions/flow.ts
index 9c40791..8c795cc 100644
--- a/packages/client/src/tiptap/core/extensions/flow.ts
+++ b/packages/client/src/tiptap/core/extensions/flow.ts
@@ -108,7 +108,7 @@ export const Flow = Node.create<IFlowOptions>({
   addInputRules() {
     return [
       nodeInputRule({
-        find: /^\$flow $/,
+        find: /^\$flow\$$/,
         type: this.type,
         getAttributes: () => {
           return { width: '100%', defaultShowPicker: true, createUser: this.options.getCreateUserId() };
diff --git a/packages/client/src/tiptap/core/extensions/iframe.ts b/packages/client/src/tiptap/core/extensions/iframe.ts
index ae8493c..5b34c0c 100644
--- a/packages/client/src/tiptap/core/extensions/iframe.ts
+++ b/packages/client/src/tiptap/core/extensions/iframe.ts
@@ -98,7 +98,7 @@ export const Iframe = Node.create({
   addInputRules() {
     return [
       nodeInputRule({
-        find: /^\$iframe $/,
+        find: /^\$iframe\$$/,
         type: this.type,
         getAttributes: () => {
           return { width: '100%' };
diff --git a/packages/client/src/tiptap/core/extensions/katex.ts b/packages/client/src/tiptap/core/extensions/katex.ts
index 9cf31aa..7e655d9 100644
--- a/packages/client/src/tiptap/core/extensions/katex.ts
+++ b/packages/client/src/tiptap/core/extensions/katex.ts
@@ -78,7 +78,7 @@ export const Katex = Node.create<IKatexOptions>({
   addInputRules() {
     return [
       nodeInputRule({
-        find: /^\$katex $/,
+        find: /^\$katex\$$/,
         type: this.type,
         getAttributes: () => {
           return { defaultShowPicker: true, createUser: this.options.getCreateUserId() };
diff --git a/packages/client/src/tiptap/editor/collaboration/kit.ts b/packages/client/src/tiptap/editor/collaboration/kit.ts
index c188c8d..ef5ff56 100644
--- a/packages/client/src/tiptap/editor/collaboration/kit.ts
+++ b/packages/client/src/tiptap/editor/collaboration/kit.ts
@@ -83,7 +83,7 @@ const placeholders = [
   '使用 markdown 语法进行输入',
   '输入 @ 来提及他人',
   '输入 : 来插入表情',
-  '你知道吗？输入 $katex 然后按一下空格就可以快速插入数学公式，其他节点操作类似哦',
+  '你知道吗？输入 $katex 然后在输入一个 $ 就可以快速插入数学公式，其他节点操作类似哦',
 ];
 
 const getCreateUserId = () => safeJSONParse(window.localStorage.getItem('user')).id;