Abstract: In order to solve the problem of difficulty in supporting the final mining of the working face under complex conditions, taking the 3308 fully mechanized caving working face of Dongtan Coal Mine as the engineering background, based on the complex engineering conditions and equipment conditions on site, and taking into account the control of inclined mining, support and conveyor, and grid connection methods, a reasonable plan for high mining height final mining and grid connection has been designed and developed, which has been successfully applied on site, effectively ensuring the normal withdrawal of the working face and simplifying the operation process, Improved homework efficiency.