Abstract: In order to ensure safe and high-efficient operation of intelligent fully mechanized mining equipments and normalized application of intelligent fully mechanized mining technologies, for fully mechanized mining equipments such as shearer, hydraulic support and video system in large mining height fully mechanized mining face of Shaanxi Huangling No.2 Coal Mine Co., Ltd., some key technologies were focused on including on precise height sensor and its protection equipment, mechanical and hydraulic system reliability, CAN bus communication isolation, remote start-stop control and outer spraying equipment for shearer, pressure sensor, travel sensor and support pushing control for hydraulic support and wide-angle camera with high performance and multi-angle adjustable mounting frame for video system. The key technologies can continuously improve reliability and monitoring accuracy of intelligent large mining height fully mechanized mining equipments.