The invention relates to an economic evaluation method of a coal mine gas control trusteeship mode project, comprising the following steps: S1, compiling enterprise quota according to enterprise personnel quality, mechanical equipment degree, technology and management level, etc.; S2: Calculating the engineering cost, including the total income and total cost of the gas control custody project, and the calculation method of the engineering cost adopts the bill of quantities method; S3: performing financial evaluation, obtaining the capital inflows and outflows from the beginning to the end ofthe project, as well as the predicted results of various economic indicators; S4: performing Sensitivity analysis, including unit price of engineering construction subcontracting, engineering construction quantity and collection period; S5: performing Risk evaluation; S6: performing Comprehensive evaluation, through the financial evaluation, uncertainty analysis of the project financial evaluationclassification, combined with the project risk quantitative evaluation of the project risk classification, performing comprehensive evaluation of the gas control engineering project,judging the feasibility of the project, and providing targeted measures.