In the course of spsce docking,the process from the first contact to finishing the capture and buffering after the capture are the research focus of docking dynamics,and establishing the dynamical model and simulation is an effective way for the research.In this paper,in accordance with the docking mechanism of androgynous and peripheral type with inner guide petals,and based on the mechanism physical model,the dynamical models in docking capture process and buffering process were built,and some user-defined modules were developed using the interface of the famous software named DADS,which can accomplish the simulation of docking procedure.