Abstract: Aiming at the safety evaluation of hydraulic steel gate which has been in service for a long time and does not have the conditions for prototype detection. The three-dimensional finite element method was used to directly establish the real geometric model and finite element model of the steel gate, which is then adopted to analyze the strength and stiffness of the gate structure under common operating conditions and instantaneous opening conditions, and evaluate its safety according to the steel gate design specifications. Taking the radial steel gate of Wuluwati water control project in Xinjiang as an example. Through the analysis, it is concluded that the strength and stiffness of the radial gate structure under the two analysis conditions meet the requirements of the steel gate design specifications. The gate lifting force has a great impact on the strength and stiffness of the overall structure of the gate, especially on the strength of the gate top beam structure and the upper main beam structure. The strength of the top beam plate structure is reduced by 2. 61 times and the stiffness is reduced by 18. 24%. The results can provide a practical analysis method for the safety evaluation of steel gate which is also very helpful in terms of providing valuable reference for the safety evaluation of steel gate and a theoretical basis for improving the product design of steel gate.