diff --git a/apps/emqx_rule_engine/src/emqx_rule_funcs.erl b/apps/emqx_rule_engine/src/emqx_rule_funcs.erl
index 7354a217f..55917f751 100644
--- a/apps/emqx_rule_engine/src/emqx_rule_funcs.erl
+++ b/apps/emqx_rule_engine/src/emqx_rule_funcs.erl
@@ -706,52 +706,10 @@ map_get(Key, Map) ->
     map_get(Key, Map, undefined).
 
 map_get(Key, Map, Default) ->
-    case maps:find(Key, Map) of
-        {ok, Val} -> Val;
-        error when is_atom(Key) ->
-            %% the map may have an equivalent binary-form key
-            BinKey = emqx_rule_utils:bin(Key),
-            case maps:find(BinKey, Map) of
-                {ok, Val} -> Val;
-                error -> Default
-            end;
-        error when is_binary(Key) ->
-            try %% the map may have an equivalent atom-form key
-                AtomKey = list_to_existing_atom(binary_to_list(Key)),
-                case maps:find(AtomKey, Map) of
-                    {ok, Val} -> Val;
-                    error -> Default
-                end
-            catch error:badarg ->
-                Default
-            end;
-        error ->
-            Default
-    end.
+    emqx_rule_maps:nested_get(map_path(Key), Map, Default).
 
 map_put(Key, Val, Map) ->
-    case maps:find(Key, Map) of
-        {ok, _} -> maps:put(Key, Val, Map);
-        error when is_atom(Key) ->
-            %% the map may have an equivalent binary-form key
-            BinKey = emqx_rule_utils:bin(Key),
-            case maps:find(BinKey, Map) of
-                {ok, _} -> maps:put(BinKey, Val, Map);
-                error -> maps:put(Key, Val, Map)
-            end;
-        error when is_binary(Key) ->
-            try %% the map may have an equivalent atom-form key
-                AtomKey = list_to_existing_atom(binary_to_list(Key)),
-                case maps:find(AtomKey, Map) of
-                    {ok, _} -> maps:put(AtomKey, Val, Map);
-                    error -> maps:put(Key, Val, Map)
-                end
-            catch error:badarg ->
-                maps:put(Key, Val, Map)
-            end;
-        error ->
-            maps:put(Key, Val, Map)
-    end.
+    emqx_rule_maps:nested_put(map_path(Key), Val, Map).
 
 mget(Key, Map) ->
     mget(Key, Map, undefined).