Space docking mechanism was used to realize the space docking and separation for the aircraft and space station. In order to simulate the process of space separation, the buffering test table was developed to study the variety rule attitude angle and attitude angle velocity of the aircraft and space station. At the same time, the digital prototype model was built to analyze the movement characteristics of the space vehicles. Comparing the results obtained from the two analysis methods, this paper demonstrates the effect of the buffering test table on connection and separation experimentation.