The roller-compacted concrete（RCC）arch dam is widely used in hydraulic engineering for its economy and good structural properties.However，the stress distribution analysis and deformation prediction of RCC arch dams are difficult due to the complex construction and material characteristics.In this paper，a three-dimensional finite element analysis model for the Shankouyan RCC arch dam was established，which fully considers the influence of material nonlinearity，construction stratification and temperature change on the performance of the dam.The accurate simulation of the internal stress，strain and temperature field of the dam was realized.The displacement amplitude of the dam structure is small under different operating conditions，and the maximum principal tensile stress and maximum principal compressive stress of the dam structure do not exceed the allowable strength value of concrete material，which conforms to the requirements of the code.Through three-dimensional finite element analysis，the complex mechanical behavior of the RCC arch dam is effectively revealed，which can provide the scientific basis for dam structure optimization，construction quality control and safety evaluation.