1.College of Mechanical Engineering, Liaoning Technical University, Fuxin ，China; 2.Coal Mining & Designing Branch，China Coal Research Institute，Beijing ，China

In view of the problem of wear and even failure of the contact surface caused by the high transient temperature between the smoothing shoe and the scraper during the advancement of the shearer sliding, a smooth friction-heating of the dynamic friction coefficient under the influence of the pulverized coal interface layer solid-thermo-mechanical coupling mathematical modelis constructed, and the sliding shoe load obtained from the experiment is used as an input, and Comsol Multiphysics was used to analyze the solid-thermal-mechanical coupling characteristics between the front and rear smoothing boots and the scraper under the influence of dry coal powder and water-containing coal powder interface respectively. The coupling characteristics were analyzed.The results show that the temperature between the contact surfaces is related to the force of the sliding shoes and the state of the pulverized coal. The maximum temperature of the front and rear smooth shoes under the dry pulverized coal interface is 460.04 K and 433.73 K, and the highest temperature position is at the center of the active joint; The highest temperature of the front and rear smooth boots under the pulverized coal interface is 438.31 K and 418.62 K,and the highest temperature position is also located at the center of the active joint.