In order to accurately grasp the seepage control conditions of Shigu dam in the process of removal and reinforcement of Gaozhou reservoir, this paper analyzes and evaluates the seepage control status of Shigu main dam and auxiliary dam in combination with its engineering geological conditions and field test results. The analysis results show that the permeability of dam body and head is relatively weak, which basically meets the requirements of this reinforcement. However, due to the influence of geological structure, the partial head of dam has the possibility of seepage around the dam, so it needs to be treated with anti-seepage treatment. At the same time, in the reinforcement process, the observation of groundwater level should be strengthened, so as to grasp the fluctuation characteristics of groundwater level in real time and ensure the safety of reinforcement process. Through the analysis of this paper, the current situation of seepage control of Shigu dam is effectively mastered, which lays a theoretical foundation for its reinforcement and danger elimination design.