Abstract: Based on the structural feature of roller compacted concrete dam, 3 D elastic plastic finite element method (FEM) analysis of roller compacted concrete (RCC) arch dam is carried out, the equivalent deformation model and equivalent elastic matrix are developed. The method using pressured dam element at key bedding joint and dam element at other dam body is proposed to model RCC dam. Based on smeared cracking model, four parameter criterion, Mohr Coulumb criterion and Drucker Prager criterion are used to simulate nonlinear feature of dam body, bedding joint and foundation. At last, the nonlinear FEM analysis of Shapai RCC Arch Dam is presented.