diff --git a/src/utils/remarkSyntaxDiagram.js b/src/utils/remarkSyntaxDiagram.js
index 822a40c5589de08add5315ee06b8f17e63b24296..b2c67dade291ce1984a8a1cabe112a7034e7e648 100644
--- a/src/utils/remarkSyntaxDiagram.js
+++ b/src/utils/remarkSyntaxDiagram.js
@@ -16,8 +16,12 @@ const NON_TERMINAL_WIDTH_FACTOR = 12 / 110
  */
 const TERMINAL_WIDTH_FACTOR = NON_TERMINAL_WIDTH_FACTOR * 1.2
 
+// 隐藏括号匹配
+// / '(' _ c:choice _ ')' _ '[' _ '...' _ ']' { return {type: 'OneOrMore', item: c, repeat: {type: 'Skip'}} }
+// / '(' _ c:choice _ ')' _ '[' _ ',' _ '...' _ ']' { return {type: 'OneOrMore', item: c, repeat: {type: 'Terminal', text: ','}} }
+// / '(' _ c:choice _ ')' { return c }
 
-// TODO: 匹配注释有问题 /** */ 内部的*无法匹配
+// 匹配注释有问题 /** */ 内部的*无法匹配
 const ebnfParser = pegjs.generate(`
   grammar = p:(_ production _)+ {
     return p.map(d => d[1]);
@@ -62,10 +66,6 @@ const ebnfParser = pegjs.generate(`
     / n:nonTerminal _ '[' _ ',' _ '...' _ ']' { return {type: 'OneOrMore', item: n, repeat: {type: 'Terminal', text: ','}} }
     / n:nonTerminal !(_ '::=') { return n }
     
-    / '(' _ c:choice _ ')' _ '[' _ '...' _ ']' { return {type: 'OneOrMore', item: c, repeat: {type: 'Skip'}} }
-    / '(' _ c:choice _ ')' _ '[' _ ',' _ '...' _ ']' { return {type: 'OneOrMore', item: c, repeat: {type: 'Terminal', text: ','}} }
-    / '(' _ c:choice _ ')' { return c }
-
     / '{' _ c:choice _ '}' _ '[' _ '...' _ ']' { return {type: 'OneOrMore', item: c, repeat: {type: 'Skip'}} }
     / '{' _ c:choice _ '}' _ '[' _ ',' _ '...' _ ']' { return {type: 'OneOrMore', item: c, repeat: {type: 'Terminal', text: ','}} }
     / '{' _ c:choice _ '}' { return c }
@@ -81,7 +81,7 @@ const ebnfParser = pegjs.generate(`
     const t = text();
     return {type: 'Terminal', text: t.substr(1, t.length - 2)};
   }
-  nonTerminal = [0-9a-zA-Z_=,*]+ {
+  nonTerminal = [0-9a-zA-Z_=,*\(\)]+ {
     return {type: 'NonTerminal', text: text()};
   }
   _ = [ \\n\\r\\t]*