Abstract: Because of gas exceeding the limit, the problem of frequent shutdown and low operating rate of shearer often appears during the period of automation mining in thin seam with high gas. Based on the field measurements and theoretical analysis about gas concentration in the panel, the influence mechanism between cutting speed and gas concentration is explored. Upper corner is the main gas monitoring point with shearer position during automation mining. What’s more, there is a positive correlation between gas concentration in the upper corner and cutting speed basically. However, gas concentration in the upper corner is negatively correlated with the distance between the shearer and upper corner. Based on this, self-adaptive adjustment technology of shearer cutting speed base on monitoring feedback of methane concentration was proposed. As a result of industrial field tests, the probability of gas concentration exceeding the limit was decresed using the technology. It can provide technical reference for automation mining in thin seam with high gas.