The utility model provides a fuel supply system with double engines, and relates to the field of vehicle fuel supply. The fuel supply system comprises a fuel tank, a fuel inlet three-way valve, a mainsupply oil way and a fuel return three-way valve. The main supply oil way comprises a first oil supply pipeline and a second oil supply pipeline which are used for supplying oil to an engine. An inlet of the oil inlet three-way valve is communicated with the fuel tank through a pipeline, and the other two outlets are correspondingly communicated with inlets of the first oil supply pipeline and the second oil supply pipeline respectively. An outlet of the oil return three-way valve is communicated with the fuel tank through a pipeline, and the other two inlets are correspondingly communicatedwith oil return openings of the two engines respectively. All parts of the fuel supply system are compact in position structure, and the occupied space of the whole vehicle is small. Pipelines are highly integrated, the pipeline length is greatly shortened, and cost is saved.