Abstract: We propose a method for determining objective identification criteria for regional rainstorm processes based on a comprehensive intensity index and affected areas using Hebei Province as an example. Utilizing daily precipitation data from 142 national meteorological stations in the Hebei Province from 1971 to 2020, we developed six methods for analyzing the comprehensive intensity indices of rainstorm disaster events. These methods were based on the maximum precipitation, maximum daily precipitation, total number of rainstorm stations, event duration, average precipitation of daily rainstorm stations, and average number of daily rainstorm stations. According to the correlation analysis between the comprehensive intensity index and affected areas, the optimal assessment method for the comprehensive intensity index and the optimal objective identification criteria for regional rainstorm processes in Hebei Province were determined. These criteria were then used to identify regional rainstorm processes in Hebei Province, and the spatial and temporal characteristics of the processes were analyzed. Results showed that the method effectively established identification criteria for regional rainstorm processes, and the identification results exhibited good consistency and correlation with disaster data. Thus, the method was suitable for objectively identifying regional rainstorm processes and was easy to employ and promote due to the clear logical relationship between the identification standard of regional rainstorm process and this method. From 1971 to 2020, 252 regional rainstorm processes occurred in Hebei Province, with an annual average of 5.0. The number of rainstorm occurrences showed a decreasing trend, and the comprehensive intensity index showed a nonsignificant decreasing trend. These regional rainstorm processes occurred from April to November, with most events (77%) occurring in July and August. The frequency of the regional rainstorm processes tended to increase from northwest to southeast, with the highest concentration observed in the central, southern, and Bohai Rim regions and the lowest in the northwest.