diff --git a/apps/modbus/include/modbus_ast.hrl b/apps/modbus/include/modbus_ast.hrl
index 412189f..2634501 100644
--- a/apps/modbus/include/modbus_ast.hrl
+++ b/apps/modbus/include/modbus_ast.hrl
@@ -113,7 +113,6 @@
 
 -record(ast, {
     modbus,
-    device_ios = [],
     devices = [],
     processors = [],
     alarms = []
diff --git a/apps/modbus/src/modbus_parser.erl b/apps/modbus/src/modbus_parser.erl
index 393dd98..f32d140 100644
--- a/apps/modbus/src/modbus_parser.erl
+++ b/apps/modbus/src/modbus_parser.erl
@@ -66,7 +66,8 @@ parse(Input) when is_binary(Input) ->
 
             case length(Modbus) == 1 of
                 true ->
-                    AST = #ast{modbus = hd(Modbus), device_ios = Templates, devices = Devices, processors = Processors, alarms = Alarms },
+                    NDevices = lists:map(fun(Device) -> merge_io(Device, Templates) end, Devices),
+                    AST = #ast{modbus = hd(Modbus), devices = NDevices, processors = Processors, alarms = Alarms },
                     {ok, AST};
                 false ->
                     {error, modbus_block_error}
@@ -358,4 +359,21 @@ strip_quotes(Str) when is_list(Str) ->
     Str1 = string:trim(Str, leading, "\""),
     Str2 = string:trim(Str1, trailing, "\""),
     Str3 = string:trim(Str2, leading, "'"),
-    string:trim(Str3, trailing, "'").
\ No newline at end of file
+    string:trim(Str3, trailing, "'").
+
+merge_io(Device = #modbus_device{device_io = undefined}, _Templates) ->
+    Device;
+merge_io(Device = #modbus_device{device_io = IOName}, Templates) ->
+    case lists:search(fun(#modbus_device_io{name = T0}) -> IOName =:= T0 end, Templates) of
+        {value, #modbus_device_io{poll_interval = PollInterval, retries = Retries, retry_timeout = RetryTimeout, metrics = Metrics, controls = Controls}} ->
+            %% 合并配置项目
+            Device#modbus_device{
+                poll_interval = PollInterval,
+                retries = Retries,
+                retry_timeout = RetryTimeout,
+                metrics = Metrics,
+                controls = Controls
+            };
+        false ->
+            Device
+    end.
\ No newline at end of file
diff --git a/apps/modbus/src/modbus_service.erl b/apps/modbus/src/modbus_service.erl
index d0c4015..da3c1a6 100644
--- a/apps/modbus/src/modbus_service.erl
+++ b/apps/modbus/src/modbus_service.erl
@@ -88,10 +88,9 @@ start_link(AST = #ast{}) ->
 %% @doc Whenever a gen_statem is started using gen_statem:start/[3,4] or
 %% gen_statem:start_link/[3,4], this function is called by the new
 %% process to initialize.
-init([AST = #ast{modbus = Modbus = #modbus{transport = Transport, error_log = ErrorLog, access_log = AccessLog}, device_ios = IOs, devices = Devices, alarms = Alarms}]) ->
+init([AST = #ast{modbus = Modbus = #modbus{transport = Transport, error_log = ErrorLog, access_log = AccessLog}, devices = Devices, alarms = Alarms}]) ->
     %lager:debug("[modbus_service] ast is: ~p", [AST]),
-    lager:debug("[modbus_service] io is: ~p", [IOs]),
-    %lager:debug("[modbus_service] devices is: ~p", [Devices]),
+    lager:debug("[modbus_service] devices is: ~p", [Devices]),
 
     DevicesMap = start_devices(Devices),
     %% 建立连接
@@ -317,19 +316,3 @@ create_log_file(FileName) when is_binary(FileName) ->
             undefined
     end.
 
-merge_io(Device = #modbus_device{device_io = undefined}, _Templates) ->
-    Device;
-merge_io(Device = #modbus_device{device_io = IOName}, Templates) ->
-    case lists:search(fun(#modbus_device_io{name = T0}) -> IOName =:= T0 end, Templates) of
-        {value, #modbus_device_io{poll_interval = PollInterval, retries = Retries, retry_timeout = RetryTimeout, metrics = Metrics, controls = Controls}} ->
-            %% 合并配置项目
-            Device#modbus_device{
-                poll_interval = PollInterval,
-                retries = Retries,
-                retry_timeout = RetryTimeout,
-                metrics = Metrics,
-                controls = Controls
-            };
-        false ->
-            Device
-    end.
\ No newline at end of file