Abstract: The operating of vehicle consumes a large number of petroleum. Seeking and developing the substitute fuel can relieve the more and more serious petroleum crisis. M58 methanol petrol that has added the special material can substitute petrol to satisfy the vehicle operating needs,and reduce tail gas emission greatly at the same time. This also can embody good environmental protection. The coal, natural gas and wood can plentifully be converted into methanol. The text takes the gasoline engine as a research object,and it has carried on external characteristic contrast testing from the power export, torsion export and the rate of fuel consumption both M58 methanol petrol and the petrol of 90 gasoline. As a result, the M58 methanol petrol engine can export well power in low and middle speed, and it can satisfy the needs of the vehicle normal operating. This experiment can provide the technique support for the extensive usage of the methanol petrol.