Based on large finite element analysis software ANSYS, took static analysis of the ship lock's cambered triangular gate of Xia Shi harbor as the background, the paper built the finite element model of gate. Considering the major load effects of gravity, wind-force, water pressure, it analyzed the static characteristics of gate in the condition of water storage and shipping,got the distribution situation of stress and deformation under different operations, checked the strength, rigidity and stability of the gate, and evaluated the safety of gate too. The results indicated that the whole arc triangular gate and every structure part meet the requirements of strength, rigidity and stability.The study can provide theory reference for the design and check of similar hydraulic steel gate.