The cost control of a construction project refers to the planning of labor costs, material costs, mechanical shift costs and other necessary expenses incurred in various specific activities, as well as the timely benefit analysis during the course of the formation of the project cost, correct deviation dynamically, implement scientific management in the whole process, control the production cost within the planned cost range, so as to improve the economic efficiency of the enterprise. In order to ensure the realization of the cost goal, the project manager department must take the cost goal as the basis, the connection construction project concrete situation, carries on the layer upon layer decomposition to the cost general goal, becomes each sub-division, the sub-project’s resources consumption level, establishing the system of contracting responsibility. The material interests of those responsible should be closely combined with the performance of the task in order to fully arouse the enthusiasm of those responsible and make the construction project obtain the best economic benefits.