Abstract: View of the problem of gas migration in considering fluid-structure interaction,based on the analysis of previous studies,this paper summarizes about the effective stress principle and the gas migration mechanism of the coal containing gas,points out the problem.The conclusions are as follows:① the principle of effective stress on coal and gas needs to be given the shared adsorption between expansion stress and pore pressure ;② about the mechanism of gas migration in coal,the key is how to distinguish seepage and diffusion process completely.Then the research prospect is given.