Rat trace detector

The invention discloses a rat trace detector comprising a plurality of probes and a detection host. Each probe comprises an image acquisition unit, a sensing unit, a control unit, and a power supply unit. When a rat passes by the detection area of one probe, infrared radiation emitted by the rat triggers the sensing unit, the sensing unit generates an electrical signal and sends the electrical signal to the control unit, the control unit sends a control instruction to the image acquisition unit according to the received electrical signal, the image acquisition unit acquires the movement trace of the rat and sends acquired image information to the detection host, and the detection host stores the image information. Each power supply is used to provide energy needed for work of the corresponding probe. By adopting the rat trace detector of the invention, the movement trace of rats can be recorded accurately and effectively, and the time for quarantine inspectors to find the trace of rats is shortened greatly.