diff --git a/apps/iot/src/iot_rule_parser.erl b/apps/iot/src/iot_rule_parser.erl
index ee94354..d14b6b4 100644
--- a/apps/iot/src/iot_rule_parser.erl
+++ b/apps/iot/src/iot_rule_parser.erl
@@ -11,6 +11,8 @@
 
 %% API
 -export([parse/1, test/0]).
+-export([parse_bracket/1]).
+
 
 test() ->
     %Rule = <<"SELECT * FROM service.data WHERE id > 0 AND (name = 'anlicheng' OR name = 'test')">>,
@@ -133,3 +135,29 @@ get_tag(_) ->
     complex.
 
 
+%% 括号解析
+parse_bracket(Tokens) ->
+    parse_bracket(Tokens, [], []).
+
+parse_bracket([], [], S) ->
+    lists:reverse(S);
+parse_bracket([], Acc, S) ->
+    lager:debug("acc is: ~p", [Acc]),
+    lists:reverse([lists:reverse(Acc)|S]);
+parse_bracket([$(|Tokens], Acc, S) ->
+    {Child, RestTokens} = parse_bracket0(Tokens, []),
+    %lager:debug("child is: ~p, rest: ~p, s1: ~p", [Child, RestTokens, [Child, lists:reverse(Acc)|S]]),
+    parse_bracket(RestTokens, [], [Child, lists:reverse(Acc)|S]);
+parse_bracket([H|Tokens], Acc, S) ->
+    parse_bracket(Tokens, [H|Acc], S).
+
+parse_bracket0([$(|Tokens], Acc) ->
+    Child = parse_bracket(Tokens),
+
+parse_bracket0([$)|Tokens], Acc) ->
+    Child = lists:reverse(Acc),
+    {Child, Tokens};
+parse_bracket0([H|Tokens], Acc) ->
+    parse_bracket0(Tokens, [H|Acc]).
+
+