Abstract: By measuring the airflow pressure along 32₂11(1) working face, the pressure inside and outside airtight wall and its nearby tunnel of 3229 goaf ,it used numerical simulation, analyzed the air leakage situation. According to the role of airtight wall for different locations, environment in Rujigou Coal Mine, it rationally designed the structure of airtight wall, selected the sealing materials and construction techniques, worked out the basic parameters of airtight wall with shock resistance and pressure release.