What about strong seismicity in Chinese mainland after Wenchuan M_S8.0 Earthquake? This paper discusses this question based on the theory of strong seismic stimulus and characteristics of strong earthquake group preparation, and combining with both parallel computing technology and dynamic seismic tracing. At the end of the paper, some characteristics of spatial distribution parameter of spatio-temporal relation of strong earthquakes (At value) before the Wenchuan Earthquake were interpreted from a position of mechanism of strong earthquake process.