The value of the research on dynamic mechanism for the leaders to practice mass line is to solve the problem in dynamic intensity and sustainability. Based on the analysis of the structural function of dynamic sources for the leaders to practice mass line, this paper discusses the dynamic mechanism model for the challenge to suit new situation. Under the political ecological context of China, the logic ideas of the dynamic mechanism construction for the leaders to practice mass line are correcting ideas, high emphasis, making plan and layout, institutional match and monitoring and execution.