Abstract:At present,the rigid-body limit equilibrium method adopted in the design of crane beam on rock wall can not reflect the actual mechanical behavior of crane. Finite element method is a broadly used effective approach to the analysis of crane beam on rock wall. The authors will focus on a few key technical problems,and complete a series of relevant research work. According to mechanical behavior of crane beam on rock wall,the relevant mechanical model and estimation formula of safety are established;some factors influencing on the results of finite element method are also studied,such as the mesh size,model range,length of anchor-bolts sleeve,classes of surrounding rocks,in-situ stresses etc.;and the double effect of excavation release stress in construction period and wheel pressure in working period are studied too. The main achievement has been quoted by Design Criterion of Crane Beam on Rock Wall for Underground Powerhouse(draft) and explanation items.