The utility model discloses a function detection device for a vehicle body controller, belongs to the field of automobile electronic product detection technology, and mainly aims to solve problems that a conventional function detection device is disorderly-arranged, can not form an integral detection device, occupies a large area and is inconvenient for detection and operation. The function detection device is characterized by comprising a power supply, an industrial control computer, a signal generation module, a liquid crystal display screen, a load, a clamp, a control keyboard, a cable, a four-layer frame and a cabinet main body; the liquid crystal display screen is arranged on the first layer of the frame; the clamp is arranged on the second layer of the frame; the power supply, the industrial control computer and the signal generation module are disposed inside the cabinet main body and on the third layer of the frame; and the load is disposed on the fourth layer of the frame. The function detection device for a vehicle body controller overcomes the defects of the conventional function detection device, is high in automation and convenient in device upgrade, is convenient for tracking faults of a product by utilization of a bar code, is mainly used for hardware function detection of a T01BCM vehicle body controller, etc.