Abstract: Based on the data of latent focal region in North China seismic belt and active faults in Hebei Province, the geological factor and mid-and long-term forecast factor were determined by using the quantity method of geological data and magnitude-time model of mid-and long term prediction.The geological factor show (1) the highest values in Tangshan, Beijing, Xingtai and Handan;(2) the ratio of geological factor in three types region(Holocene, late Pleistocene and no Holocene or late Pleistocene fault activity) is about 12:4:1.The mid-and long-term forecast factor use the result of Shao Huicheng et al, considering the historical earthquakes and modern seismic data, the annual change rate of seismic moment can represent the long-term average, which can avoid the situation of obscure the real long-term seismicity by using the data of inactive or active period and reduce the the uncertainty of the results.