In order to improve the success rate of stratigraphic trap exploration, this paper takes Jiyang depression of Bohai bay basin as an example, starts from the analysis of discovered stratigraphic reservoirs, and combines with the weight evaluation of geological risk factors to establish the effective evaluation method of stratigraphic trap accumulation. The results show that the risk assessment of trap exploration in the basin margin of Jiyang depression mainly includes four geological conditions, such as operation and accumulation matching conditions, preservation conditions, trap conditions and reservoir conditions, and 10 geological elements. Drilling success rate method and cumulative probability curve method can be used to classify the risk levels of geological elements in different geological conditions. The weight coefficients of different geological elements can be determined by the method of comparing the influence degree of success rate. Finally, the grading standard and risk evaluation method for stratigraphic trap exploration in the basin margin of Jiyang depression were established, which improved the oil-bearing evaluation ability of stratigraphic trap and improved and developed the risk evaluation method system for exploration. The method system can be used for reference and guidance in the exploration of similar basins in eastern China.