Abstract: The requirements of artificial accelerograms in nuclear power plant seismic design are reviewed,and comparison study is made on the variety of artificial accelerogams generation approach,the main difference about these approaches lies in how to obtain the initial accelerogams,including based on the real earthquake record which has a spectrum similar to design spectrum and the relation between response spectrum and power spectrum density.Using the later approach,a computer code is implemented for the calculation artificial accelerograms,and the calculation for specify design response spectrum is performed.The result shows that the time history has good configuration and statistic parameter to real earthquake record and is highly compatible to the design spectrum.The computer code is suitable for the artificial accelerograms calculation.