A vehicle anti-theft device, including a processor, a current control unit, a first bluetooth transmitter, and an operator, wherein the processor, the current control unit and a signal transmitter are linked to a vehicle starter battery. The processor is electrically connected to the current control unit, the first bluetooth transmitter, a vehicle electric generator, and battery cells of the starter battery. The processor is used to control operation of the current control unit, and the current control unit is used to control the starter battery to output current to the vehicle circuitry system. The current control unit includes a large current circuit and a small current circuit. The large current circuit is provided with a single-pole relay. The small current circuit comprises a self-resetting fuse.