Abstract: Earthquake occurs frequently, it is a reflection of the earth’s rhythm. Seismite, a term first proposed by A. Scilacher(1969), was subsequently used at a high tide of its research by European and American geologists. Mutti et a1.(1984) regarded megaturbidite as seismoturbidite which may be used as an element of event stratigraphy for mapping and bedtracing. In China, Song Tianrui is the first geologist who proposed in 1985 the seismo-tsunami sequence as the marker to subdivide and correlate the Wumishan Formation in Yanshan area. Qiao Xiufu et a1.(1994, 1995) established “Seismic sequence in carbonate rocks by vibrational liquefaction” and the “sabkha seismite sequence” in the Upper Sinian-Lower Cambrian Series, and they also made a correlation and genetic stratigraphic study on strata of the same age in the eastern part of North China. The present authors (1991, 1994)pointed out that the Permian seismite in the west margin of the Yangtze massif is composed of two parts: the seismo-disturbed beds of autochthonous facies and the sliding seismite of allochthonous facies; and these two are separated by a seismounconformity which formed instantaneously under water. The sliding seismitcs arc composed of a multicyclic seismitic sequences, in which the beds which mixed fossils show a normal and ordered arrangement and are related apparently to the repealed normal faultings along the basin margin. Hence a new recognition of the Dongwu extension movement along the west margin of the Yangtze massif is proposed, and the study of seismite is geared to the tectono-catastrophe event and event stratigraphy. In the geologic history China was a multiseismic country, hence it is quite possible that there may exist certain favourable sites for the establishment, research and development of a new branch of modern stratigraphy-Seismostratigraphy.