Abstract: The study of runoff generation model has far-reaching significance for the construction of rainstorm flood routing model and the coordinated development of regional ecological economy. Taking the control area of Shuyuan Station in Sihe River Basin, a typical hilly area in Jining City, Shandong Province, as the research object, 46 typical rainstorm flood processes were selected to analyze the hydrological characteristic parameters of the basin, and the runoff generation model of the basin was constructed by drawing the center line and outer line of precipitation runoff relationship. Research shows that: ①The maximum water storage capacity of the Shuyuan Station Watershed l_m is 120.0 mm; ② By drawing the dual accumulation curve of the watershed, it can be seen that there has been no significant change in the annual flow pattern of the Shuyuan Station Watershed from 1971 to 2023; ③ According to the constructed watershed runoff generation model, under the same influencing rainfall conditions, the relative difference between the outer line value and the center line value of the watershed runoff at Shuyuan Station is 9.1% to 40.0%; ④ The peak of surface runoff has a highly linear correlation with the peak of shallow groundwater runoff, with a correlation coefficient of 0.908 1.