Abstract: In order to study the difficulty of mining the deep sharply inclined−thin ore body, the sharply inclined thin ore body north of the 13th line of the 50 m middle section and 00 m middle section of the Habaha Ashele Copper Mine in Xinjiang was taken as the research object. The engineering geology was investigated, the mining scheme was designed, numerical simulation software was utilized, numerical models were developed, and finally the displacement evolution, stress distribution and plastic zone distribution patterns during the mining process were investigated. Optimization of the sharply inclined thin ore body mining plan for the Asher copper mine was elaborated. The results showed that this numerical simulation of one time mining 3 m, 4 m, 5 m of the three scenarios formed by the displacement evolution, stress distribution and plastic zone distribution law was more or less the same. The law did not have much influence on the mining work. The production man hours and the economic costs of the Ashele Copper Mine were taken into account, the option of mining the 5 m ore body in one go was selected as the option for mining the sharply inclined thin ore body at the Ashele Copper Mine.