Internal auditing is the enterprise self-discipline and supervision mechanism, and is an important part of enterprise management, perfect and improve the economic benefit of the inner needs. But, our country enterprise internal audit has defects and shortcomings, especially in recent years as China's economic system reform of further and gradually establish a modern enterprise system, internal audit in a huge development at the same time, also faces all sorts of serious challenges. Therefore, our country enterprise internal audit need timely to improve and perfect the need for greater and more better and faster growth and development. The paper introduces the meaning of internal audit organization design, and studied, the role of internal audit in enterprises, scientific analysis of internal audit in China on the basis of the current development, perfecting the enterprise internal audit system. To improve its internal audit in enterprise management, enterprise development, also has guiding significance for improving enterprise economic benefits and safeguarding rights provided reference etc.