diff --git a/packages/client/src/tiptap/extensions/selection.ts b/packages/client/src/tiptap/extensions/selection.ts
index 19a2ef2..52a247a 100644
--- a/packages/client/src/tiptap/extensions/selection.ts
+++ b/packages/client/src/tiptap/extensions/selection.ts
@@ -1,6 +1,7 @@
 import { Extension } from '@tiptap/core';
 import { Plugin, PluginKey, NodeSelection, TextSelection, Selection, AllSelection } from 'prosemirror-state';
 import { Decoration, DecorationSet } from 'prosemirror-view';
+import { getCurrentNode, isInCodeBlock } from '../services/node';
 import { EXTENSION_PRIORITY_HIGHEST } from '../constants';
 
 export const selectionPluginKey = new PluginKey('selection');
@@ -48,8 +49,55 @@ export const SelectionExtension = Extension.create({
       new Plugin({
         key: selectionPluginKey,
         props: {
+          handleKeyDown(view, event) {
+            /**
+             * Command + A
+             * Ctrl + A
+             */
+            if ((event.ctrlKey || event.metaKey) && (event.keyCode == 65 || event.keyCode == 97)) {
+              const node = getCurrentNode(view.state);
+              // 代码块
+              if (isInCodeBlock(view.state)) {
+                const { pos, parentOffset } = view.state.selection.$head;
+                const newState = view.state;
+                const next = new TextSelection(
+                  newState.doc.resolve(pos - parentOffset + node.nodeSize - 2), //内容结束点
+                  newState.doc.resolve(pos - parentOffset) // 内容起始点
+                );
+                view?.dispatch(newState.tr.setSelection(next));
+                return true;
+              }
+            }
+
+            return false;
+          },
+          handleDoubleClickOn(view, pos, node, nodePos, event) {
+            if (node.type.name === 'codeBlock') {
+              event.preventDefault();
+              const transaction = view.state.tr.setMeta('selectNode', {
+                fromPos: nodePos,
+                toPos: nodePos + node.nodeSize,
+                attrs: { class: 'selected-node' },
+              });
+              view?.dispatch(transaction);
+              return false;
+            }
+            return true;
+          },
           decorations(state) {
-            const { doc, selection } = state;
+            return this.getState(state);
+          },
+        },
+        state: {
+          init() {
+            return DecorationSet.empty;
+          },
+          apply(ctx) {
+            if (ctx.getMeta('selectNode')) {
+              const { fromPos, toPos, attrs } = ctx.getMeta('selectNode');
+              return DecorationSet.create(ctx.doc, [Decoration.node(fromPos, toPos, attrs)]);
+            }
+            const { doc, selection } = ctx;
             const decorationSet = getDecorations(doc, selection);
             return decorationSet;
           },
diff --git a/packages/client/src/tiptap/services/node.ts b/packages/client/src/tiptap/services/node.ts
index 949fddc..b41fc7e 100644
--- a/packages/client/src/tiptap/services/node.ts
+++ b/packages/client/src/tiptap/services/node.ts
@@ -29,3 +29,17 @@ export function isInTitle(state: EditorState): boolean {
     }
   }
 }
+
+export function getCurrentNode(state: EditorState): Node {
+  const $head = state.selection.$head;
+  return $head.node($head.depth);
+}
+
+export function isInCodeBlock(state: EditorState): boolean {
+  const $head = state.selection.$head;
+  for (let d = $head.depth; d > 0; d--) {
+    if ($head.node(d).type === state.schema.nodes.codeBlock) {
+      return true;
+    }
+  }
+}
diff --git a/packages/client/src/tiptap/styles/selection.scss b/packages/client/src/tiptap/styles/selection.scss
index 81f22ba..52e0ba6 100644
--- a/packages/client/src/tiptap/styles/selection.scss
+++ b/packages/client/src/tiptap/styles/selection.scss
@@ -50,7 +50,7 @@
   .node-iframe,
   .node-mind,
   .node-banner {
-    margin-top: .75em;
+    margin-top: 0.75em;
   }
 
   .node-attachment,
@@ -72,6 +72,7 @@
     }
 
     &.selected-node {
+      position: relative;
       .render-wrapper {
         border: 1px solid var(--node-selected-border-color) !important;
 
@@ -80,6 +81,15 @@
           box-shadow: none;
         }
       }
+
+      &::after {
+        position: absolute;
+        content: '';
+        inset: 0px;
+        opacity: 0.3;
+        pointer-events: none;
+        background-color: rgb(179, 212, 255);
+      }
     }
 
     &:not(.has-focus) {