The natural equilibrium state of rock mass can be disturbed in the process of mining,after which the engineering geological problem varying in form and extent will take place,and the safe production of mine is influenced also. In order to make clear the engineering geological conditions of mining district and assess the stability of rock mass at Anqing copper mine,a detail investigation on the engineering geological condition of roch mass in the mining section of 1# orebody was made on the basis of collecting and collating the original information. Meanwhile,the author used the related theory and methods of mechanics to determine the types of the engineering geological rock groups and the rock-mass structure,and made a quality assessment on the stability of rock mess. The engineering geological conditions of rock mass in the mining district were systematically demonstrated.