In view of the high operating frequency of self-elevating drilling platforms in Bohai sea area and many times pile plug-in operation in the same blocks, the original pile holes bring serious slip risk to pile plug-in operation for self-elevating platform. By establishing the finite element analysis model of 2 types of commonly used pile shoes and using the research methods of simulation calculation and comparative analysis, the simulation research is carried out in the plastic failure characteristics of pile foundation soil, the movement law of pile foundation soil and the lateral slip force of the pile shoes while pile plugging in the positions at different distances to the “old footprints”, the force characteristics and rules of pile foundation soil and pile shoe under different soil conditions are obtained, and the influence of the “old footprints” of different positions on the slip risk of self-elevating platform is analyzed.