diff --git a/ddl/db_test.go b/ddl/db_test.go
index 269954f99f803..fba087f66f092 100644
--- a/ddl/db_test.go
+++ b/ddl/db_test.go
@@ -1576,6 +1576,15 @@ func (s *testDBSuite) TestCreateTable(c *C) {
 	c.Assert(err, NotNil)
 }
 
+func (s *testDBSuite) TestBitDefaultValue(c *C) {
+	tk := testkit.NewTestKit(c, s.store)
+	tk.MustExec("use test")
+	tk.MustExec("create table t_bit (c1 bit(10) default 250, c2 int);")
+	tk.MustExec("insert into t_bit set c2=1;")
+	tk.MustQuery("select bin(c1),c2 from t_bit").Check(testkit.Rows("11111010 1"))
+	tk.MustExec("drop table t_bit")
+}
+
 func (s *testDBSuite) TestCreateTableWithPartition(c *C) {
 	s.tk = testkit.NewTestKit(c, s.store)
 	s.tk.MustExec("use test;")
diff --git a/ddl/ddl_api.go b/ddl/ddl_api.go
index 2ab73110f6a9f..5a1eaf9331768 100644
--- a/ddl/ddl_api.go
+++ b/ddl/ddl_api.go
@@ -345,7 +345,9 @@ func columnDefToCol(ctx sessionctx.Context, offset int, colDef *ast.ColumnDef, o
 				if hasDefaultValue, value, err = checkColumnDefaultValue(ctx, col, value); err != nil {
 					return nil, nil, errors.Trace(err)
 				}
-				col.DefaultValue = value
+				if err = col.SetDefaultValue(value); err != nil {
+					return nil, nil, errors.Trace(err)
+				}
 				removeOnUpdateNowFlag(col)
 			case ast.ColumnOptionOnUpdate:
 				// TODO: Support other time functions.
@@ -473,9 +475,9 @@ func setTimestampDefaultValue(c *table.Column, hasDefaultValue bool, setOnUpdate
 	// For timestamp Col, if is not set default value or not set null, use current timestamp.
 	if mysql.HasTimestampFlag(c.Flag) && mysql.HasNotNullFlag(c.Flag) {
 		if setOnUpdateNow {
-			c.DefaultValue = types.ZeroDatetimeStr
+			c.SetDefaultValue(types.ZeroDatetimeStr)
 		} else {
-			c.DefaultValue = strings.ToUpper(ast.CurrentTimestamp)
+			c.SetDefaultValue(strings.ToUpper(ast.CurrentTimestamp))
 		}
 	}
 }
@@ -500,7 +502,7 @@ func checkDefaultValue(ctx sessionctx.Context, c *table.Column, hasDefaultValue
 		return nil
 	}
 
-	if c.DefaultValue != nil {
+	if c.GetDefaultValue() != nil {
 		if _, err := table.GetColDefaultValue(ctx, c.ToInfo()); err != nil {
 			return types.ErrInvalidDefault.GenByArgs(c.Name)
 		}
@@ -522,7 +524,7 @@ func checkDefaultValue(ctx sessionctx.Context, c *table.Column, hasDefaultValue
 // checkPriKeyConstraint check all parts of a PRIMARY KEY must be NOT NULL
 func checkPriKeyConstraint(col *table.Column, hasDefaultValue, hasNullFlag bool, outPriKeyConstraint *ast.Constraint) error {
 	// Primary key should not be null.
-	if mysql.HasPriKeyFlag(col.Flag) && hasDefaultValue && col.DefaultValue == nil {
+	if mysql.HasPriKeyFlag(col.Flag) && hasDefaultValue && col.GetDefaultValue() == nil {
 		return types.ErrInvalidDefault.GenByArgs(col.Name)
 	}
 	// Set primary key flag for outer primary key constraint.
@@ -1247,7 +1249,7 @@ func (d *ddl) AddColumn(ctx sessionctx.Context, ti ast.Ident, spec *ast.AlterTab
 	if err != nil {
 		return errors.Trace(err)
 	}
-	col.OriginDefaultValue = col.DefaultValue
+	col.OriginDefaultValue = col.GetDefaultValue()
 	if col.OriginDefaultValue == nil && mysql.HasNotNullFlag(col.Flag) {
 		zeroVal := table.GetZeroValue(col.ToInfo())
 		col.OriginDefaultValue, err = zeroVal.ToString()
@@ -1458,7 +1460,10 @@ func setDefaultValue(ctx sessionctx.Context, col *table.Column, option *ast.Colu
 	if err != nil {
 		return ErrColumnBadNull.Gen("invalid default value - %s", err)
 	}
-	col.DefaultValue = value
+	err = col.SetDefaultValue(value)
+	if err != nil {
+		return errors.Trace(err)
+	}
 	return errors.Trace(checkDefaultValue(ctx, col, true))
 }
 
@@ -1487,7 +1492,9 @@ func setDefaultAndComment(ctx sessionctx.Context, col *table.Column, options []*
 			if hasDefaultValue, value, err = checkColumnDefaultValue(ctx, col, value); err != nil {
 				return errors.Trace(err)
 			}
-			col.DefaultValue = value
+			if err = col.SetDefaultValue(value); err != nil {
+				return errors.Trace(err)
+			}
 		case ast.ColumnOptionComment:
 			err := setColumnComment(ctx, col, opt)
 			if err != nil {
@@ -1709,7 +1716,10 @@ func (d *ddl) AlterColumn(ctx sessionctx.Context, ident ast.Ident, spec *ast.Alt
 	// Clean the NoDefaultValueFlag value.
 	col.Flag &= ^mysql.NoDefaultValueFlag
 	if len(specNewColumn.Options) == 0 {
-		col.DefaultValue = nil
+		err = col.SetDefaultValue(nil)
+		if err != nil {
+			return errors.Trace(err)
+		}
 		setNoDefaultValueFlag(col, false)
 	} else {
 		err = setDefaultValue(ctx, col, specNewColumn.Options[0])
diff --git a/executor/show.go b/executor/show.go
index ac7de894ba0ab..1b2c21f81549f 100644
--- a/executor/show.go
+++ b/executor/show.go
@@ -503,7 +503,8 @@ func (e *ShowExec) fetchShowCreateTable() error {
 				buf.WriteString(" NOT NULL")
 			}
 			if !mysql.HasNoDefaultValueFlag(col.Flag) {
-				switch col.DefaultValue {
+				defaultValue := col.GetDefaultValue()
+				switch defaultValue {
 				case nil:
 					if !mysql.HasNotNullFlag(col.Flag) {
 						if col.Tp == mysql.TypeTimestamp {
@@ -514,7 +515,7 @@ func (e *ShowExec) fetchShowCreateTable() error {
 				case "CURRENT_TIMESTAMP":
 					buf.WriteString(" DEFAULT CURRENT_TIMESTAMP")
 				default:
-					defaultValStr := fmt.Sprintf("%v", col.DefaultValue)
+					defaultValStr := fmt.Sprintf("%v", defaultValue)
 					if col.Tp == mysql.TypeBit {
 						defaultValBinaryLiteral := types.BinaryLiteral(defaultValStr)
 						buf.WriteString(fmt.Sprintf(" DEFAULT %s", defaultValBinaryLiteral.ToBitLiteralString(true)))
diff --git a/model/model.go b/model/model.go
index bc03eac4d817b..2fe3c7b6ebb00 100644
--- a/model/model.go
+++ b/model/model.go
@@ -22,6 +22,7 @@ import (
 	"github.com/juju/errors"
 	"github.com/pingcap/tidb/mysql"
 	"github.com/pingcap/tidb/types"
+	"github.com/pingcap/tidb/util/hack"
 	"github.com/pingcap/tipb/go-tipb"
 )
 
@@ -69,6 +70,7 @@ type ColumnInfo struct {
 	Offset              int                 `json:"offset"`
 	OriginDefaultValue  interface{}         `json:"origin_default"`
 	DefaultValue        interface{}         `json:"default"`
+	DefaultValueBit     []byte              `json:"default_bit"`
 	GeneratedExprString string              `json:"generated_expr_string"`
 	GeneratedStored     bool                `json:"generated_stored"`
 	Dependences         map[string]struct{} `json:"dependences"`
@@ -88,6 +90,31 @@ func (c *ColumnInfo) IsGenerated() bool {
 	return len(c.GeneratedExprString) != 0
 }
 
+// SetDefaultValue sets the default value.
+func (c *ColumnInfo) SetDefaultValue(value interface{}) error {
+	c.DefaultValue = value
+	if c.Tp == mysql.TypeBit {
+		// For mysql.TypeBit type, the default value storage format must be a string.
+		// Other value such as int must convert to string format first.
+		if v, ok := value.(string); ok {
+			c.DefaultValueBit = []byte(v)
+			return nil
+		}
+		return types.ErrInvalidDefault.GenByArgs(c.Name)
+	}
+	return nil
+}
+
+// GetDefaultValue gets the default value of the column.
+// Default value use to stored in DefaultValue field, but now,
+// bit type default value will store in DefaultValueBit for fix bit default value decode/encode bug.
+func (c *ColumnInfo) GetDefaultValue() interface{} {
+	if c.Tp == mysql.TypeBit && c.DefaultValueBit != nil {
+		return hack.String(c.DefaultValueBit)
+	}
+	return c.DefaultValue
+}
+
 // FindColumnInfo finds ColumnInfo in cols by name.
 func FindColumnInfo(cols []*ColumnInfo, name string) *ColumnInfo {
 	name = strings.ToLower(name)
diff --git a/table/column.go b/table/column.go
index c111c0fa9e589..e3766a688816e 100644
--- a/table/column.go
+++ b/table/column.go
@@ -227,7 +227,7 @@ func NewColDesc(col *Column) *ColDesc {
 	}
 	var defaultValue interface{}
 	if !mysql.HasNoDefaultValueFlag(col.Flag) {
-		defaultValue = col.DefaultValue
+		defaultValue = col.GetDefaultValue()
 	}
 
 	extra := ""
@@ -310,7 +310,7 @@ func GetColOriginDefaultValue(ctx sessionctx.Context, col *model.ColumnInfo) (ty
 
 // GetColDefaultValue gets default value of the column.
 func GetColDefaultValue(ctx sessionctx.Context, col *model.ColumnInfo) (types.Datum, error) {
-	return getColDefaultValue(ctx, col, col.DefaultValue)
+	return getColDefaultValue(ctx, col, col.GetDefaultValue())
 }
 
 func getColDefaultValue(ctx sessionctx.Context, col *model.ColumnInfo, defaultVal interface{}) (types.Datum, error) {
diff --git a/table/tables/tables.go b/table/tables/tables.go
index 4cfc7a85303a1..23a58cae54c86 100644
--- a/table/tables/tables.go
+++ b/table/tables/tables.go
@@ -936,7 +936,7 @@ func CanSkip(info *model.TableInfo, col *table.Column, value types.Datum) bool {
 	if col.IsPKHandleColumn(info) {
 		return true
 	}
-	if col.DefaultValue == nil && value.IsNull() {
+	if col.GetDefaultValue() == nil && value.IsNull() {
 		return true
 	}
 	if col.IsGenerated() && !col.GeneratedStored {