Abstract: Aiming at the problems of scraper bending and fracture, sprocket sealing failure, and other issues in the use of the Shendong 7-meter high mining face slot transfer machine, by analyzing the failure characteristics of scraper and sprocket components and the stress status of components, measures such as upgrading the chain, increasing the scraper section and sprocket shaft diameter, optimizing the chain center distance, etc. were taken to comprehensively improve the stress status of scraper and sprocket components, and increase the scraper strength by 1.7 times, The deflection of the sprocket shaft at the bearing support area is reduced to 1/8, significantly improving the performance of the components. Component universality should be fully considered during equipment renovation,drive frame and pan can be used directly to reduce renovation cost. By renovation to imported equipment, experiences are accumulated, and development of domestic coal mining equipment is promoted.