Abstract: By means of empirical formula method, isothermal adsorption method and multiple linear regression method, the paper compares the characteristics of shale gas content in different phase states of Chang 7 member in the southeastern Ordos basin, establishes the qualitative or quantitative relationships between the shale gas content and its influencing factors, and discusses the main controlling factors of the shale gas content in each phase state. The results show that the average contents of adsorbed gas, free gas and dissolved gas in the shale of Chang 7 member in the study area are 1.37 m3/t, 1.81 m3/t and 0.74 m3/t, respectively, the adsorbed gas volume gradually decreases from southwest to northeast, and the contents of free gas and dissolved gas decrease gradually from northwest to southeast. The total organic carbon（TOC） content is the main factor controlling the adsorbed gas content in the shale of Chang 7 member; the mixed layer of illite/ montmorillonite in minerals has an important influence on the content of adsorbed gas; with the increase of organic matter maturity, a large number of residual liquid hydrocarbons appear, the contents of adsorbed gas and free gas decrease, and the content of dissolved gas increases. The medium-large pore volume is the main factor controlling the contents of free gas and dissolved gas. Sandstone intercalation and brittle minerals such as quartz and feldspar affect the proportion of medium-large pores and further influence the contents of free gas and dissolved gas