The construction of a tidal gate at the Huangpu River estuary is a major water conservancy project to ensure the safety of Shanghai's flood prevention and control.The project construction must adapt to the comprehensive needs of shipping development.To ensure the smoothness and safety of navigation, the engineering site selection research is carried out from the perspective of reducing the impact of navigation conditions.Based on the importance and characteristics of the project, the navigation safety risk atlas analysis method is adopted to conduct accident analysis, risk factor identification, and risk factor analysis.Eight key factors affecting gate site selection are extracted, including river stability, water depth conditions, water flow conditions, ship routes, navigation density, impact on surrounding planning, impact on important water related facilities, and contruction conditions.The results show that the impact of the Zhabei gate site on the navigation conditions of the waterway is relatively small, and it is recommended as the key research gate site for the next stage from the perspective of navigation.The research findings can provide technical references for project initiation decision-making and the deepening study of engineering schemes in the next stage.