Abstract: The paper analyzes the characteristics of geochemistry, petromineralogy, reservoir physical properties and reservoir spaces, gas bearing properties and preservation conditions for the shales of the Lower Cambrian Lujiaping formation in Chengkou area of northeastern Chongqing, and performs correlation analysis of the factors influencing shale gas content with grey correlation theory. The results show that the preservation of the shales in Lujiaping formation is quite good in the study area. The shale reservoir has high organic matter content and maturity and high brittleness, whose kerogen is dominated by Type I; the reservoir spaces are dominated by intergranular pores and large pores are developed in the reservoir with large unit absorbing capacity. But the unfavorable factors such as complicated stratigraphic structures and very high maturity of organic matters of the shales of the Lower Cambrian Lujiaping formation in Chengkou area of northeastern Chongqing may result in the difficulties for future development