Two kinds of methods for the determination of seismic parameters are presented in this paper,i.e.seismic source zoning method and grid-spatially smoothing method.The Gaussian smoothing method and the modified Gaussian smoothing method are described in detail,and a comprehensive analysis of the advantages and disadvantages of these methods are made.Then we take the central China as the study region,and use the Gaussian smoothing method and seismic source zoning method to build the seismic model for the calculation of annual seismic activity rate,calculate the seismic risk from the models to get the ground motion acceleration zoning map.The differences between the maps from the models are discussed and the causes are investigated.The results show that the spatially smoothing method is suitable for the seismic hazard estimate of moderate strong seismicity regions or the seismic hazard caused by background seismicity,and the seismic source zoning method is suitable for the estimate of seismic hazard caused by determined seismotectonics.The combination the two methods and the consideration of seismicity and known seismotectonics make up a feasible method to estimate the seismic hazard of moderate strong seismicity region.[著者文摘]