Wangzhuang Mine with extremely complicated working face geological conditions， the maximum working face inclined angle is 27°， syncline structure crossing working face， working face goes through large inclined angle down-dip mining， close to large angle up-dip mining. The working face adopted large mining height fully mechanized mining technology， through numerical simulation， the feasibility of the technology in the mine was verified， the key technology problem was analyzed based on observation on site， the result showed that the technology was suitable for the working face， its technical-economic indicator corresponded to the mining demands.