Abstract: In view of the problems of poor coal flow transportation, low production efficiency and poor engineering quality caused by frequent upward and downward movement of scraper conveyor in 250107-1 fully mechanized mining face of Huating Coal Mine, this paper analyzes the causes of upward and downward movement of scraper conveyor. The results show that there is an objective upward or downward trace of △l during the movement of the scraper conveyor in the near horizontal fully mechanized mining face, and there is a side thrust along the upward and downward direction of the scraper conveyor. In the process of mining by one-way coal cutting, the deflection of push rod is the root cause of the accelerated upward slide of scraper conveyor and the skew of hydraulic support. In order to restrain the passive situation of continuous upward and downward movement of the scraper conveyor in the fully mechanized mining face, the combined application of the methods of adjusting the pseudo slope of the fully mechanized mining face, the single column auxiliary pushing the scraper conveyor, Side guards adjust the position of the hydraulic support, and the offset transfer machine is adopted in the field, which effectively curbs the harm caused by the upward movement and decline of the scraper conveyor, and ensures the safe, safe and efficient mining of the fully mechanized mining face.