The bull whipping phenomenon in the deployment process of a large parachute was analyzed. Based on its character, the dynamic model of the whole process was built in five stages. At first, the basic model and restriction model were built respectively. Through their combination, the dynamic model of multibody systems of every stage was built. Then by connecting the dynamic model of five stages, the dynamic model of the entirely deployment process was accomplished. Through analyzing the results of simulation, the canopy displacement and shape, the velocity of top segment canopy, departure distance and tensile force distributing of canopy and lines when forming the bull whipping phenomenon are educed, some important and character data of the bull whipping phenomenon are summarized. The conclusion can provide reference for the engineering design department to designing, improving and using the large parachute.