The results of seismic hazard analysis are significantly influenced by the seismicity parameters in the potential seismic source zones (PSSZ) and the attenuation relations of the seismic ground motion. According to the PSSZ map used to prepare the fifth-generation seismic zonation map of China, and by the use of two magnitude interval types (type I, type II), we established the self-edit and the fifth-generation seismic zonation map's spatial distribution functions of the PPSZ, respectively. By combining these with four groups of attenuation relations of the horizontal peak ground acceleration (PGA) on the Qinghai-Tibet plateau and its peripheral areas, we computed the PGA of the rock sites for a 10% probability of exceedance in 50 a (10% P.E in 50 a) (return period of 475 years) for 81 points along the Qinghai-Tibet Engineering Corridor (QTEC). To do so, we used the China probabilistic seismic hazard analysis method and empirical equations to translate the general site PGAs from the rock site PGAs. Then, we compared the results with the archive limits of the fifth-generation seismic zonation map of China. These results show that the PGAs with attenuation relations of the horizontal PGA in western China are greatest, in Yunnan region are smallest, and in the Sichuan-Tibet region and northeastern Tibetan plateau are in the middle. When attenuation relations are known, the PGAs computed by self-edit spatial distribution functions are generally slightly larger than those computed by the spatial distribution functions of the fifth-generation seismic zonation map. In the area of the PSSZ, in which the upper limit magnitude is 8.5, and its nearby area, the magnitude interval types of the spatial distribution functions significantly influence the results of the seismic hazard analysis. Our comprehensive analysis shows the calculation results to be relatively ideal when using the self-edit spatial distribution functions of type II and the PGA attenuation relations in the Sichuan-Tibet region. Lastly, using this relatively ideal parameter combination, we computed the rock site PGAs of the grid points (0.05°×0.05°) in QTEC and used empirical equations to translate the rock site PGAs to general site PGAs. Then, with the aid of arcGIS, we drew the rock site and general site PGAs for the 10% P.E in 50 a zonation maps of the QTEC.