Economic relations of modern enterprises are the most important factor for the modern enterprise management in Manufacturing Engineering, which is mainly carried out by contract and the effectiveness of contract. As foreign construction enterprises entering China market, with their advantages of powerful funds technology and management, China's construction enterprises will exert enormous pressure and impact. Meanwhile, our construction enterprises couldn't be in order to enter the international market and international competition, without high level of contract management. For this reason, China's construction enterprises should be attention to contract management, and improve awareness of all employees of the contract. The contract management is into business management, it should be allowed to operate freely according to the law, to accelerate the development of construction enterprises in China.