Based on the brief introduction of the concept and significance of PDCA mode, this paper analyzes the specific application of PDCA mode in construction site management. The analysis results show that PDCA mode is a cyclic and dynamic new management mode. By applying it to the construction site management, the problems existing in the construction site management can be solved step by step, the management level can be improved continuously, the relationship between project quality, cost and schedule can be coordinated, and greater comprehensive benefits can be obtained.