The utility model discloses an anti -theft device for vehicle and vehicle security system. Wherein, this anti -theft device for vehicle includes: orientation module for locating vehicle's positional information, the main control board is connected with orientation module, reaches master server with positional information on through wireless communication module, and wherein, master server is usedfor the remote control instruction issued to the vehicle, wireless communication module is connected with the main control board for receive the remote control instruction that master server issued, wherein, the remote control instruction includes at least: a control command for inciting somebody to action the oil circuit of vehicle cuts off. The utility model provides a current anti -theft devicefor vehicle take place can only report to the police and can't in time prevent the technical problem of larceny under the stolen condition at the vehicle.