Abstract: In order to comprehensively and accurately evaluate the gas drainage scheme of multi-branch horizontal wells and solve the problem of the single evaluation criteria and the incompatibility of each evaluation factor,the model of multi-factor group evaluation for the gas drainage of multi-branch horizontal wells based on fuzzy structural element is established.The fuzzy production capacity formula for multi-branch horizontal wells is constructed by fuzzy mathematics method.Weight is determined by entropy weight method and judgment matrix method,the accumulated experience of experts for many years is linked to objective data,thus,the fuzzy evaluation model is used to evaluate the gas drainage scheme of multi branch horizontal wells in the Shaqu Mine.The result shows that the fuzzy production capacity formula of the multi-branch horizontal well makes the calculation result more consistent with the actual test result.The multi-factor group evaluation model based on fuzzy structure element can effectively and accurately arrange the order of gas drainage scheme for different multi-branch horizontal wells,and provide strong guidance for the selection of engineering scheme.