Abstract: The paper discusses on the improvement of the legislation of our L C system in terms of the criminal law and the civil and commercial law with the view of our present law-making problems as well as the practical crimes of swindles related to L C cases in course of the increased L C using in the final accounts in the swift increase of the international trade resulting from our open-door policy. It points out that it is necessary to take the action of the law-making in time. It also specifically gives the definition of the crime of L C swindles and L C defrauds.