Abstract: In order to determine the rational alternate distance of simultaneous mining face in ultra-close coal seams, taking simultaneous mining face arrangement in ultra-close coal seams in Zhaozhuang Coal Mine 9^# and 10^# seams as the research background, we used the theoretical calculation and numerical simulation to comparatively analyze the feasibility of the rational alternate distance of simultaneous mining face of decompression and regulator zone, and simulation calculated the rational alternate distance of simultaneous mining face. The results show that the upper coal seam made the maximum failure depth of the coal seam on the bottom floor is 9.11 m, disturbed range of the bottom floor of behind the working face is 33.15 m, and determine working surface of the bottom coal seam should be arranged in regulator zone of working surface of upper coal seam, and rational alternate distance should be less than 35 m. Field measure results show that: the working face is under reasonable and wrong distance, the working face is less pressure, the cycle is not obvious, the working face can be safely returned.