The engineering geological survey of the ore rock in Haoyaoer Hudong Gold Mine is carried out.The data of 899 structural planes in 3 study areas are analyzed and counted by Dips software,and the relevant isometric diagrams,pole diagrams,structural plane spacing histograms and distribution frequency histograms are drawn.The RMR method is used to evaluate the rock quality of ore rock in the field,such as rock core test,point load test of ore rock,observation of structural plane state,groundwater state,statistics of RQD value of ore rock and so on.Through comprehensive analysis and study,the results show that the ore rock RMR value in the east of Dongkeng is 45 and the rock mass quality belongs to general rock mass,while the RMR values in the west of Dongkeng and Xikeng are both 42,and the rock quality belongs to the general-poor rock mass;the ore rock is relatively broken,and the joint spacing of the 3 study areas is 0.32 m,0.26 m and 0.25 m respectively,which has a great influence on the stability of rock mass;the ore rock is mainly composed of several groups of near-horizontal and near-vertical structural planes,the rock is broken and the stability is poor.