To strengthen the research on the overall performance of the underground explosion-proof rubber wheel is the key point to ensure the safety of underground operation. The WC29R explosion-proof rubber wheel truck of Shanxi Tiandiwangpo Coal Industry was taken as the research, the problems existing in the truck were analyzed, and the improvement design of the explosion-proof rubber wheel truck's anti-malfunction warning device for the passenger door, exhaust gas purification device and automatic exhaust gas discharge device for anti-backwater was studied. The application effect showed that the improved rubber wheel carriage passenger door was safer and the exhaust gas emission was lower, which solved the fault problem of high temperature return of the vehicle engine, improved the safety of the rubber wheel carriage and guaranteed the operation rate of the rubber wheel carriage and the production safety in mines.