Based on studies of regional tectonic setting and observation of drilling cores, seismite is recognized in Silurian strata of in the Tarim Basin. Many kinds of soft-sedimentary deformation structures are found in seismite, such as step micro-faults, pleate within layers, liquefaction sandstone and clay veins, vibrational liquefaction deformation structure and seismic breccias. Observation in drilling cores found that the sequence of seismite is different for the different seismic intensity, and the stronger the seismic intensity, the sedimentary sequence integrity of seismites gets better. Two kinds of seismite sequence are recognized. Because different seismite structures are formed in different seismic intensity, the relationship between seismite character and seismic intensity is studied. It provides a theoretical foundation for the tectonic evolution studies and seismite recognition in the Tarim Basin, and supplies evidence for research of paleo-seismicity.