The cost management of construction project is the foundation and core of the survival and development of construction enterprises, the aim of increasing income and reducing expenditure is the more important link in the project management, and the project cost management has become the core content of the project construction management. Project cost management is a complex and systematic project. To do well in construction project cost management, a practical and feasible mechanism is needed. The responsibility system of cost management should be formulated and perfected, and a series of rules and regulations should be formulated, to grasp the scientific, reasonable and practical methods to control the construction cost of construction projects in an all-round dynamic way, from the time limit cost control to benefit.