It is found that the typhoon rainstorm isassociated with the presence of a frontal zone,high- and low-level jet;an intense frontal zone isresponsible for the enhancement of 200 hPa southwesterly jet and ageostrophic divergence on therear right,whose effect will excite gravity-inertia waves;the adjustment(spanning 3～6h)isnone other than the abrupt intensification of the r.

Results showed that heavy snowstorm event resulted from upper frontal zones combined,lower warm shearline,ground low vortex developed and moved eastward to the north.

Then,500hPa and 100hPa fields of height and its departure in winter over Northern Hemisphere,also the intensities and positions of polar frontal zone over Xinjiang are calculated corresponding to the two kinds of abnormal years.

Based on the results of exploration and test, the formation containing diatomaceous earth was systematically made off and contrasted in Xianfeng mining district, the macroscopic characteristics and mineral compose of diatomaceous earth were analyzed in detail.