diff --git a/mysql-test/suite/tianmu/r/create_table.result b/mysql-test/suite/tianmu/r/create_table.result
index 137042d505..12c8ba729a 100644
--- a/mysql-test/suite/tianmu/r/create_table.result
+++ b/mysql-test/suite/tianmu/r/create_table.result
@@ -574,7 +574,33 @@ t1	CREATE TABLE `t1` (
   `fld2` datetime DEFAULT '1211-01-01 00:00:00'
 ) ENGINE=TIANMU DEFAULT CHARSET=latin1
 # error of support type
-create table t_unsupport_type (a2 bit DEFAULT NULL);
-ERROR HY000: Unsupported data type[bit]
 create table t_unsupport_type (a2 json DEFAULT NULL);
 ERROR HY000: Unsupported data type[json]
+drop table if exists bittypes;
+Warnings:
+Note	1051	Unknown table 'test.bittypes'
+create table bittypes (
+id int not null primary key,
+bit1 bit(1),
+bit2 bit(2),
+bit4 bit(4),
+bit8 bit(8),
+bit16 bit(16),
+bit32 bit(32),
+bit63 bit(63)
+) ENGINE=tianmu DEFAULT CHARSET=utf8mb4;
+show create table bittypes;
+Table	Create Table
+bittypes	CREATE TABLE `bittypes` (
+  `id` int(11) NOT NULL,
+  `bit1` bit(1) DEFAULT NULL,
+  `bit2` bit(2) DEFAULT NULL,
+  `bit4` bit(4) DEFAULT NULL,
+  `bit8` bit(8) DEFAULT NULL,
+  `bit16` bit(16) DEFAULT NULL,
+  `bit32` bit(32) DEFAULT NULL,
+  `bit63` bit(63) DEFAULT NULL,
+  PRIMARY KEY (`id`)
+) ENGINE=TIANMU DEFAULT CHARSET=utf8mb4
+create table tc(a bit(64)) engine=tianmu;
+ERROR HY000: The bit(M) type, M must be less than or equal to 63 in tianmu engine.
diff --git a/mysql-test/suite/tianmu/t/create_table.test b/mysql-test/suite/tianmu/t/create_table.test
index 5c86b8eb6a..6df708eb74 100644
--- a/mysql-test/suite/tianmu/t/create_table.test
+++ b/mysql-test/suite/tianmu/t/create_table.test
@@ -397,6 +397,23 @@ show create table t1;
 
 --echo # error of support type
 --error 6
-create table t_unsupport_type (a2 bit DEFAULT NULL);
---error 6
 create table t_unsupport_type (a2 json DEFAULT NULL);
+
+# test new type bit
+drop table if exists bittypes;
+create table bittypes (
+ id int not null primary key,
+
+ bit1 bit(1),
+ bit2 bit(2),
+ bit4 bit(4),
+ bit8 bit(8),
+ bit16 bit(16),
+ bit32 bit(32),
+ bit63 bit(63)
+
+) ENGINE=tianmu DEFAULT CHARSET=utf8mb4;
+show create table bittypes;
+
+--error 6
+create table tc(a bit(64)) engine=tianmu;
diff --git a/storage/tianmu/common/common_definitions.h b/storage/tianmu/common/common_definitions.h
index 58e5df7655..81d751c34e 100644
--- a/storage/tianmu/common/common_definitions.h
+++ b/storage/tianmu/common/common_definitions.h
@@ -70,6 +70,7 @@ enum class ColumnType : unsigned char {
   MEDIUMINT,
   BIGINT,
   LONGTEXT,
+  BIT,
   UNK = 255
 };
 
@@ -137,6 +138,8 @@ constexpr int64_t TIANMU_BIGINT_MIN = NULL_VALUE_64;
 constexpr int32_t TIANMU_MAX_INDEX_COL_LEN_LARGE = 3072;
 constexpr int32_t TIANMU_MAX_INDEX_COL_LEN_SMALL = 767;
 
+constexpr uint32_t kTianmuBitMaxPrec = 63;  // in the future we'll expand to 64.
+
 #define NULL_VALUE_D (*(double *)("\x01\x00\x00\x00\x00\x00\x00\x80"))
 #define TIANMU_INT_MIN (-2147483647)
 #define TIANMU_MEDIUMINT_MAX ((1 << 23) - 1)
diff --git a/storage/tianmu/core/aggregator_basic.cpp b/storage/tianmu/core/aggregator_basic.cpp
index a4fbdbe156..e1747647b9 100644
--- a/storage/tianmu/core/aggregator_basic.cpp
+++ b/storage/tianmu/core/aggregator_basic.cpp
@@ -570,8 +570,8 @@ types::BString AggregatorListT::GetValueT(unsigned char *buf) {
     if ((*p != static_cast<char>(AggregatedValue_Mark::AM_NOT_FILL)) &&
         (*p != static_cast<char>(
                    AggregatedValue_Mark::AM_STRING_NULL)))  // empty string indicator: len==0 and nontrivial character
-      return types::BString("", 0, true);  // empty string
-    return types::BString();               // null value
+      return types::BString("", 0, true);                   // empty string
+    return types::BString();                                // null value
   }
   types::BString res(p, len);
   return res;
diff --git a/storage/tianmu/core/data_type.cpp b/storage/tianmu/core/data_type.cpp
index f55ab379d5..e8f784efc1 100644
--- a/storage/tianmu/core/data_type.cpp
+++ b/storage/tianmu/core/data_type.cpp
@@ -53,6 +53,11 @@ DataType::DataType(common::ColumnType atype, int prec, int scale, DTCollation co
       valtype = ValueType::VT_FIXED;
       fixmax = MAX(TIANMU_TINYINT_MAX, -TIANMU_TINYINT_MIN);
       break;
+    case common::ColumnType::BIT:
+      DEBUG_ASSERT((prec > 0) && (prec <= common::kTianmuBitMaxPrec));
+      valtype = ValueType::VT_FIXED;
+      fixmax = MAX(TIANMU_TINYINT_MAX, -TIANMU_TINYINT_MIN);  // TODO(fix max value with common::kTianmuBitMaxPrec)
+      break;
 
     case common::ColumnType::NUM:
       DEBUG_ASSERT((prec > 0) && (prec <= 19) && (fixscale >= 0));
diff --git a/storage/tianmu/core/engine.cpp b/storage/tianmu/core/engine.cpp
index b7a3fec888..aafcf3686b 100644
--- a/storage/tianmu/core/engine.cpp
+++ b/storage/tianmu/core/engine.cpp
@@ -487,6 +487,14 @@ void Engine::EncodeRecord(const std::string &table_path, int table_id, Field **f
         *(int64_t *)ptr = v;
         ptr += sizeof(int64_t);
       } break;
+      case MYSQL_TYPE_BIT: {
+        int64_t v = f->val_int();
+        ASSERT(v < 0, "bit type data should never less than 0.");
+        if (v > common::TIANMU_BIGINT_MAX)  // how can v > bigint max ??
+          v = common::TIANMU_BIGINT_MAX;    // TODO(fix with bit prec)
+        *(int64_t *)ptr = v;
+        ptr += sizeof(int64_t);
+      } break;
       case MYSQL_TYPE_DECIMAL:
       case MYSQL_TYPE_FLOAT:
       case MYSQL_TYPE_DOUBLE: {
@@ -555,7 +563,6 @@ void Engine::EncodeRecord(const std::string &table_path, int table_id, Field **f
       case MYSQL_TYPE_ENUM:
       case MYSQL_TYPE_GEOMETRY:
       case MYSQL_TYPE_NULL:
-      case MYSQL_TYPE_BIT:
       default:
         throw common::Exception("unsupported mysql type " + std::to_string(f->type()));
         break;
@@ -710,6 +717,13 @@ AttributeTypeInfo Engine::GetAttrTypeInfo(const Field &field) {
       }
       throw common::UnsupportedDataTypeException();
     }
+    case MYSQL_TYPE_BIT: {
+      const Field_bit_as_char *f_bit = ((const Field_bit_as_char *)&field);
+      if (/*f_bit->field_length > 0 && */ f_bit->field_length <= common::kTianmuBitMaxPrec)
+        return AttributeTypeInfo(common::ColumnType::NUM, notnull, f_bit->field_length);
+      throw common::UnsupportedDataTypeException(
+          "The bit(M) type, M must be less than or equal to 63 in tianmu engine.");
+    }
     case MYSQL_TYPE_NEWDECIMAL: {
       const Field_new_decimal *fnd = ((const Field_new_decimal *)&field);
       if (/*fnd->precision > 0 && */ fnd->precision <= 18 /*&& fnd->dec >= 0*/
diff --git a/storage/tianmu/core/tianmu_attr_typeinfo.h b/storage/tianmu/core/tianmu_attr_typeinfo.h
index ee0bd3e175..cc52d1fab6 100644
--- a/storage/tianmu/core/tianmu_attr_typeinfo.h
+++ b/storage/tianmu/core/tianmu_attr_typeinfo.h
@@ -41,16 +41,18 @@ class ATI {
   }
   static bool IsFixedNumericType(common::ColumnType attr_type) {
     return IsInteger32Type(attr_type) || attr_type == common::ColumnType::BIGINT ||
-           attr_type == common::ColumnType::NUM;
+           attr_type == common::ColumnType::NUM || attr_type == common::ColumnType::BIT;
   }
 
   static bool IsRealType(common::ColumnType attr_type) {
     return attr_type == common::ColumnType::FLOAT || attr_type == common::ColumnType::REAL;
   }
+
+  static bool IsBitType(common::ColumnType attr_type) { return attr_type == common::ColumnType::BIT; }
+
   static bool IsNumericType(common::ColumnType attr_type) {
-    return IsInteger32Type(attr_type) || attr_type == common::ColumnType::BIGINT ||
-           attr_type == common::ColumnType::NUM || attr_type == common::ColumnType::FLOAT ||
-           attr_type == common::ColumnType::REAL;
+    return IsIntegerType(attr_type) || attr_type == common::ColumnType::NUM || attr_type == common::ColumnType::FLOAT ||
+           attr_type == common::ColumnType::REAL || attr_type == common::ColumnType::BIT;
   }
 
   static bool IsBinType(common::ColumnType attr_type) {