diff --git a/apps/efka/src/efka_agent.erl b/apps/efka/src/efka_agent.erl
index 1387ff2..d68f898 100644
--- a/apps/efka/src/efka_agent.erl
+++ b/apps/efka/src/efka_agent.erl
@@ -194,7 +194,7 @@ handle_info(fetch_next, State = #state{status = ?STATE_ACTIVATED, transport_pid
     case micro_data_model:fetch_next() of
         error ->
             ok;
-        {ok, #micro_data{device_uuid = DeviceUUID, service_name = ServiceName, at = At, tags = Tags, fields = Fields}} ->
+        {ok, #micro_data{id = Id, device_uuid = DeviceUUID, service_name = ServiceName, at = At, tags = Tags, fields = Fields}} ->
             DataPacket = message_pb:encode_msg(#data{
                 device_uuid = DeviceUUID,
                 service_name = ServiceName,
@@ -203,6 +203,10 @@ handle_info(fetch_next, State = #state{status = ?STATE_ACTIVATED, transport_pid
                 fields = Fields
             }),
             efka_transport:send(TransportPid, ?METHOD_DATA, DataPacket),
+
+            %% 发送后删除记录
+            ok = micro_data_model:delete(Id),
+
             %% 触发下一次
             fetch_next()
     end,
diff --git a/apps/efka/src/mnesia/micro_data_model.erl b/apps/efka/src/mnesia/micro_data_model.erl
index 51eef76..faaf240 100644
--- a/apps/efka/src/mnesia/micro_data_model.erl
+++ b/apps/efka/src/mnesia/micro_data_model.erl
@@ -15,7 +15,7 @@
 
 %% API
 -export([create_table/0]).
--export([insert/1, get_all_data/0, fetch_next/0]).
+-export([insert/1, get_all_data/0, fetch_next/0, delete/1]).
 
 create_table() ->
     %% id生成器
@@ -23,7 +23,7 @@ create_table() ->
         {attributes, record_info(fields, micro_data)},
         {record_name, micro_data},
         {disc_copies, [node()]},
-        {type, bag}
+        {type, ordered_set}
     ]).
 
 -spec insert(MicroData0 :: #micro_data{}) -> ok | {error, Reason :: any()}.
@@ -37,7 +37,21 @@ insert(MicroData0 = #micro_data{}) ->
     end.
 
 fetch_next() ->
-    ok.
+    case mnesia:dirty_first(?TAB) of
+        '$end_of_table' ->
+            error;
+        Id ->
+            [Entry] = mnesia:dirty_read(?TAB, Id),
+            {ok, Entry}
+    end.
+
+delete(Id) when is_integer(Id) ->
+    case mnesia:transaction(fun() -> mnesia:delete(?TAB, Id, write) end) of
+        {'atomic', ok} ->
+            ok;
+        {'aborted', Reason} ->
+            {error, Reason}
+    end.
 
 -spec get_all_data() -> [#micro_data{}].
 get_all_data() ->