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The key core technologies of large mining electric wheel trucks include: high-power variable current speed regulation technology, high-horsepower diesel engine technology, high-power generator technology, high-power traction motor technology, large structural parts analysis and manufacturing, control technology, system integration optimization design technology. The mining electric wheel truck has high technical content, long research and development cycle, high trial and test cost, large capital consumption and high supporting system requirements. The existence of key technologies determines that the research and development and production of mining electric wheel trucks must have sufficient technical strength and manufacturing process level, so the number of enterprises in the world that can research and develop and produce mining electric wheel trucks is not large. At present, the main producers of mining electric wheel trucks in the world are Caterpillar and Terex in the United States, Liebherr in Germany, Komatus in Japan, Hitachi and Belaz in Belarus, and these companies collectively account for more than 90% of the global mining electric wheel truck market share. The main production enterprises of large tonnage mining electric wheel trucks in China are North Heavy Truck Co., LTD., Beijing Shougang Heavy Truck Manufacturing Co., LTD., Hunan Hunan Electric Group Hunan Electric Heavy Equipment Co., LTD., etc. Among them, Northern Heavy Vehicles Co., Ltd. is an enterprise specialized in the production of ultra-large electric driven mine vehicles jointly invested by Northern Shares and Terex in 2006. The 220 tons AC drive electric wheel dump truck developed by XEMC Heavy Equipment Co., Ltd. in 2008 is the largest tonnage mine electric wheel truck developed in China. Beijing Shougang Heavy Duty Automobile Manufacturing Co., Ltd. mainly produces 170 tons of direct transmission mine electric wheel dump trucks