diff --git a/bdchain/api/ac_chain.proto b/bdchain/api/ac_chain.proto
index be0a638..0372f1d 100644
--- a/bdchain/api/ac_chain.proto
+++ b/bdchain/api/ac_chain.proto
@@ -1,6 +1,6 @@
 syntax = "proto3";
 
-package bdchain.api;
+package bdchain.api.acchain;
 
 import "google/protobuf/empty.proto";
 import "bdchain/api/common.proto";
@@ -11,7 +11,7 @@ option java_outer_classname = "AccountingChainProto";
 option java_multiple_files = true;
 
 service AccountingChain {
-  rpc ClientVersion (google.protobuf.Empty) returns (ClientVersionResponse);
+  rpc ClientVersion (google.protobuf.Empty) returns (common.ClientVersionResponse);
   rpc BlockNumber (BlockNumberRequest) returns (BlockNumberResponse);
   rpc GetBlockByNumber (GetBlockByNumberRequest) returns (Block);
   rpc GetBlockByHash (GetBlockByHashRequest) returns (Block);
@@ -25,7 +25,7 @@ message Transaction {
   bytes block_hash = 2; // 事务所在的区块的哈希，当事务处于待确认状态时为`null`
   uint32 index = 3; // 事务在区块中的位置index，当事务处于待确认状态时为`null`
   bytes hash = 4; // 事务的哈希
-  TransactionType type = 5; // 事务类型
+  common.TransactionType type = 5; // 事务类型
   bytes from = 6; // 发送账户地址
   uint64 nonce = 7; // 这条事务之前发送者所发送的事务数量
   bytes to = 8; // 接收账户地址，或者调用的合约地址，或者`null`如为合约创建
diff --git a/bdchain/api/common.proto b/bdchain/api/common.proto
index 2ae17b9..be079a5 100644
--- a/bdchain/api/common.proto
+++ b/bdchain/api/common.proto
@@ -1,6 +1,6 @@
 syntax = "proto3";
 
-package bdchain.api;
+package bdchain.api.common;
 
 option go_package = "bdchain/sdk/api/grpc/common";
 option java_package = "bdchain.api.grpc.common";
diff --git a/bdchain/api/error_details.proto b/bdchain/api/error_details.proto
index 56b234f..e6b9c02 100644
--- a/bdchain/api/error_details.proto
+++ b/bdchain/api/error_details.proto
@@ -1,6 +1,6 @@
 syntax = "proto3";
 
-package bdchain.api;
+package bdchain.api.common;
 
 option go_package = "bdchain/sdk/api/grpc/errdetails";
 option java_package = "bdchain.api.grpc.common";
diff --git a/bdchain/api/tx_ledger.proto b/bdchain/api/tx_ledger.proto
index 5ab3140..d9176a7 100644
--- a/bdchain/api/tx_ledger.proto
+++ b/bdchain/api/tx_ledger.proto
@@ -1,6 +1,6 @@
 syntax = "proto3";
 
-package bdchain.api;
+package bdchain.api.txledger;
 
 import "google/protobuf/empty.proto";
 import "bdchain/api/common.proto";
@@ -11,7 +11,7 @@ option java_outer_classname = "TransactionLedgerProto";
 option java_multiple_files = true;
 
 service TransactionLedger {
-  rpc ClientVersion (google.protobuf.Empty) returns (ClientVersionResponse);
+  rpc ClientVersion (google.protobuf.Empty) returns (common.ClientVersionResponse);
   rpc CreateLedger (CreateLedgerRequest) returns (CreateLedgerResponse);
   rpc GetLedgers (google.protobuf.Empty) returns (GetLedgersResponse);
   rpc BlockCount (BlockCountRequest) returns (BlockCountResponse);
@@ -23,7 +23,7 @@ message Transaction {
   bytes block_hash = 1;     // 事务所在的区块的哈希，当事务处于待确认状态时为`null`
   uint32 index = 2;         // 事务在区块中的位置 index，当事务处于待确认状态时为`null`
   bytes hash = 3;           // 事务的哈希
-  TransactionType type = 4; // 事务类型
+  common.TransactionType type = 4; // 事务类型
   bytes from = 5;           // 发送账户地址
   uint64 nonce = 6;         // 这条事务之前发送者所发送的事务数量
   bytes to = 7;             // 接收账户地址，或者调用的合约地址，或者`null`如为合约创建
@@ -76,7 +76,7 @@ message GetBlocksResponse {
 message SendTransactionRequest {
   string ledger = 1;
   message Transaction {
-    TransactionType type = 1;
+    common.TransactionType type = 1;
     bytes from = 2;
     bytes to = 3;
     bytes data = 4;