Abstract: During the passing of the fully mechanized mining face through the overlying residual coal pillar in some mines in the Shendong mining area, the mine pressure is particularly strong, with frequent problems such as roof rises, pressurization of supports and obstruction of transporters. Taking 22522 fully mechanized mining face of Halagou Coal Mine as the research object, we discussed the formation mechanism of the strong dynamic load effect and the response characteristics of the mining pressure during the passage of the overlying coal pillar in this face. Combined with the actual analysis of the field production, it is shown that when the working face is about 5 m from the overlying coal pillar, significant dynamic loading mine pressure phenomenon is easy to occur; when it is about 100 m from the overlying coal pillar, the step of the incoming pressure changes significantly. The author explores the subjective and objective factors affecting the safety of mining in the lower level of the face when it passes the space position of the overlying coal pillar, and puts forward the requirements and measures for the safe mining of the overlying coal pillar from the three aspects of roof control, technical measures and safety management, thus avoiding safety accidents in the process of production.