The utility model provides an oxyhydrogen gas generator system for vehicle, includes an oxyhydrogen gas generator, a sealed cavity is constituteed with upper cover adoption connecting elements to thecavity base, be equipped with following member in the sealed cavity: will along an at least baffle of vertically being equipped with of rectangular pedestal the cavity base is separated into two and is formed a plurality of little electrolysis chamber, respectively is equipped with a set of polar plate in every little electrolysis chamber, and a positive pole in every group polar plate or a side of negative pole upwards extend and constitute one and connect, and water supply installation's top is equipped with the filter, and the equipartition has a plurality of gas pockets on the filter, theupper cover is frustum shape, and the top of frustum shape upper cover is equipped with the venthole, is equipped with the spiral cover on the venthole, and the top of spiral cover is equipped with oxyhydrogen gas connector one side of upper cover is equipped with the anti -return inlet tube, with this ystem installation to the vehicle, produced hydrogen and the oxygen of generator can burn with the fuel among the engine cylinder jointly to improve combustion efficiency and improved power, the emission has still been reduced.