Recently, research of continental shale reservoirs physical properties and gas contents become a hot spot. A large sets of continental clastic layers are developed of Xu5 section in Western Sichuan Basin, the gas contents of this shale are good, it has huge shale gas exploration and development potential, but the research degree is shallow now. Based on the situation, in this paper ,by combining with a large number of tests and logging data, a comprehensive study of the physical properties and gas contents of Xu5 section shale has been made. Research results show that Xu5 section shale belong to clay rich siliceous shale facies, it has the similar physical properties with the Fort and Barnett shale in America. The influence factors of shale gas contents include: organic matter content, mineral composition and its content, physical properties and brittleness, gas occurrence state and overpressure. The main reservoir space of Xu5 section shale contain organic matter pores, mineral intercrystal pores and dissolution pores and micro fractures. There has a good positive correlation between shale gas content and the effective porosity and the gas phase permeability. When the clay content in the shale is less than 35%, the gas content and brittleness are both higher; with the increase of clay contents, there is no apparent relationship between the brittleness and shale gas contents. Shale layers that have higher gas contents also have higher gas saturation as well, the adsorption amount of the shale gas contents in Xu5 section is about 60% , indicates that the adsorption state is an important gas occurrence manner in continental shale reservoir.