Abstract: The transportation efficiency of underground motors has direct impact on mining operation efficiency.The study takes the Huize Mining Branch as the engineering background of underground transportation,analyzes the challenges the application of connected double motor technique faces in underground linear two-way haulage ways and puts forwards technical renovation measures.Remote ores loading,individually operated bunching and automatic unloading are the 3 links.Based on field working conditions,hard wares such as the way headline and track are optimized and adjusted,remote control and wireless communication technology are installed.Through system optimization and renovation,the application of connected double motor technique is successful in the joint underground linear two-way haulage ways,maximizing the haulage efficiency of motors and lowering haulage cost effectively.