Abstract: Using a large-scale multi-field coupled coalbed methane exploitation physical simulation test system to carry out gas drainage test of close distance coal seams, and the evolution law of gas pressure, deformation and their coupling relationship of each coal seam were analyzed. The results showed that: the downward trend of gas pressure in drainage layer gradually slowed down. The closer to the center of the borehole, the greater the pressure drop rate; the gas pressure of the adjacent layer showed an approximately linear downward trend, and the spatial difference of gas pressure drop was not obvious compared with drainage layer. As the drainage progresses, the rate of deformation increase in the drainage layer gradually decreases; the deformation evolution law of the adjacent seam was basically the same as the drainage layer, but the deformation of the adjacent layer at the same time was smaller than that of the drainage layer. The pressure drop of drainage layer and adjacent layer all increased with the increase of volume strain, the coupling relationship between drainage layer pressure drop and volume strain was a linear positive correlation, but the coupling relationship between adjacent layer pressure drops and volume strain was a positive exponential function relationship.