$this->module->validateOrder((int)$this->context->cart->id, 27, $total,
$this->module->displayName, null, array(), null, false, $customer->secure_key);
this method in my payment module, for create order, but it send confirmation mail and i cant disable it. Help me.
If you simply want to disable confirmation emails, then go to:
Backoffice -> Advanced Parameters -> Email -> Never Send Email
If you want a custom method, you will have to provide more detail in your question.