diff --git a/Changes b/Changes
index cad7055..c84eb56 100644
--- a/Changes
+++ b/Changes
@@ -4,6 +4,7 @@ Revision history for Perl extension Teng
         - add Plugin::Lookup.
         - fixed fork safe connection. (thanks nihen)
         - support auto reconnect dbh. (thanks nihen)
+        - [IMPORTANT] bulk_insert include core feature. do not use Plugin::BulkInsert.
 
 0.14
         - fixed deflate bug. (thanks kentaro)
diff --git a/lib/Teng.pm b/lib/Teng.pm
index 17c8330..57ad65b 100644
--- a/lib/Teng.pm
+++ b/lib/Teng.pm
@@ -297,6 +297,38 @@ sub insert {
     );
 }
 
+sub bulk_insert {
+    my ($self, $table_name, $args) = @_;
+
+    return unless scalar(@{$args||[]});
+
+    if ($self->dbh->{Driver}->{Name} eq 'mysql') {
+        my $table = $self->schema->get_table($table_name);
+        if (! $table) {
+            Carp::croak( "Table definition for $table_name does not exist (Did you declare it in our schema?)" );
+        }
+
+        if ( $table->has_deflators ) {
+            for my $row (@$args) {
+                for my $col (keys %{$row}) {
+                    $row->{$col} = $table->call_deflate($col, $row->{$col});
+                }
+            }
+        }
+
+        my ($sql, @binds) = $self->sql_builder->insert_multi( $table_name, $args );
+        $self->_execute($sql, \@binds);
+    } else {
+        # use transaction for better performance and atomicity.
+        my $txn = $self->txn_scope();
+        for my $arg (@$args) {
+            # do not run trigger for consistency with mysql.
+            $self->insert($table_name, $arg);
+        }
+        $txn->commit;
+    }
+}
+
 sub _update {
     my ($self, $table_name, $args, $where) = @_;
 
@@ -674,6 +706,31 @@ insert new record and get last_insert_id.
 
 no creation row object.
 
+=item $teng->bulk_insert($table_name, \@rows_data)
+
+Accepts either an arrayref of hashrefs.
+each hashref should be a structure suitable
+forsubmitting to a Your::Model->insert(...) method.
+
+insert many record by bulk.
+
+example:
+
+    Your::Model->bulk_insert('user',[
+        {
+            id   => 1,
+            name => 'nekokak',
+        },
+        {
+            id   => 2,
+            name => 'yappo',
+        },
+        {
+            id   => 3,
+            name => 'walf443',
+        },
+    ]);
+
 =item $update_row_count = $teng->update($table_name, \%update_row_data, [\%update_condition])
 
 Calls UPDATE on C<$table_name>, with values specified in C<%update_ro_data>, and returns the number of rows updated. You may optionally specify C<%update_condition> to create a conditional update query.
diff --git a/lib/Teng/Plugin/BulkInsert.pm b/lib/Teng/Plugin/BulkInsert.pm
index e1967d6..4a4ef18 100644
--- a/lib/Teng/Plugin/BulkInsert.pm
+++ b/lib/Teng/Plugin/BulkInsert.pm
@@ -5,6 +5,8 @@ use utf8;
 
 our @EXPORT = qw/bulk_insert/;
 
+warn "IMPORTANT: Teng::Plugin::BulkInsert is DEPRECATED AND *WILL* BE REMOVED. DO NOT USE.\n";
+
 sub bulk_insert {
     my ($self, $table_name, $args) = @_;
 
@@ -42,7 +44,7 @@ __END__
 
 =head1 NAME
 
-Teng::Plugin::BulkInsert - bulk insert helper
+Teng::Plugin::BulkInsert - (DEPRECATED) bulk insert helper
 
 =head1 PROVIDED METHODS
 
diff --git a/t/001_basic/023_bulk_insert.t b/t/001_basic/023_bulk_insert.t
index f03694c..10d29a7 100644
--- a/t/001_basic/023_bulk_insert.t
+++ b/t/001_basic/023_bulk_insert.t
@@ -5,7 +5,6 @@ use Test::More;
 my $dbh = t::Utils->setup_dbh;
 my $db_basic = Mock::Basic->new({dbh => $dbh});
 $db_basic->setup_test_db;
-Mock::Basic->load_plugin('BulkInsert');
 
 subtest 'bulk_insert method' => sub {
     $db_basic->bulk_insert('mock_basic',[
@@ -25,5 +24,17 @@ subtest 'bulk_insert method' => sub {
     is +$db_basic->count('mock_basic', 'id'), 3;
 };
 
+subtest 'DEPRECATED' => sub {
+    my $buffer = '';
+    open my $fh, '>', \$buffer or die "Could not open in-memory buffer";
+    *STDERR = $fh;
+
+        Mock::Basic->load_plugin('BulkInsert');
+
+    close $fh;
+
+    like $buffer, qr/IMPORTANT: Teng::Plugin::BulkInsert is DEPRECATED AND \*WILL\* BE REMOVED\. DO NOT USE\./;
+};
+
 done_testing;