Hydrogen and oxygen electrolyzing device and fuel-saving automobile

The invention provides an oxygen and hydrogen electrolyzing device and an oil-saving vehicle. The device comprises a direct current power supply, an electrolysis bath, a positive electrode slice and negative electrode slices, wherein the electrolysis bath is a closed electrolysis bath; the positive electrode slice has one piece, and the negative electrode slices have two pieces; the two negative electrode slices are arranged on two ends of a conducting bar; an insulated porcelain sleeve passes through the middle part of the conducting bar; the positive electrode slice is fixed on the insulated porcelain sleeve; the top of the electrolysis bath is provided with a gas conduit; and brine electrolysis, iron powder, titanium powder, aluminum powder, magnesium powder and sodium hydroxide are received in the electrolysis bath. The oil-saving vehicle comprises a vehicular battery jar, an engine and the oxygen and hydrogen electrolyzing device, wherein the gas conduit is communicated with an air entry of the engine; and the direct current power supply is the vehicular battery jar. The device is scientific and practical, is easy to electrolyze water, and particularly allows the electrolysis effect to be prominent under the action of an electrolysis catalyst The vehicle improves the combustion rate of oil by adopting oxygen and hydrogen mixed gas released by the device, so that the performance of the engine can be more prominent.