The invention relates to a vehicle body control unit which is characterized in that three categories of interfaces are integrated on the control unit: signal input interfaces comprise a combined switch (lamps and wipers), a central control door lock switch, a danger warning switch, a four-door two-lid state switch, a door interlock switch, a stop lamp switch, a remote controller and the like; control signal output interfaces comprise four door locks, a boot lock, driving lamps, high and low beams, turn lights, wipers, a headlight cleaning motor and the like; and communication interfaces comprise a left front window control module, a sunroof control unit, a rainfall sensor, a rear taillight LED drive module and the like. The interfaces are connected with a TNS (Transparent Network Substrate) relay. The invention integrates door lock control, boot lock control, headlight control, turn light control, indoor lamp control, wiper motor control, headlight cleaning motor control, sunroof control and remote control into a whole, has CAN bus communication capability, and can acquire vehicle speed and other information from the bus and transmit various acquired switch signals to the bus for other control units to use. The invention has five anti-theft modes, is more humanized, realizes a rigorous anti-theft warning function, and can effectively avoid the user's misoperation and false warning.