Abstract: With the gas content of No.8 seam Fuda Mine measured with the drilling cutting desorption method, a prediction equation of the gas content was establis hed.The regional structure evolution theory was applied to analyze the gas geological influence factors in Fuda Mine and summarized the gas deposit law of Fuda Mine. The study results showed that the fold structure, seam depth, lithology of the seam roof and floor, sink hole and structure coal would be important factors affected to the seam deposit in Fuda Mine.The mine gas pressure gradient was calculated as 0.036 4 m3/ (t.hm) .The total thickness of the structure coal in No.8 seam was 0.35 m an d would be increased in tendency along the seam inclination.The structure coal development was one of the main control factors for the gas rich gathered in the mining area.