Thermal infrared imager zero drift adjusting device

The utility model provides a thermal infrared imager zero drift adjusting device, which comprises a collimator, a theodolite, a thermal infrared imager and a temperature changing box, and is characterized in that one side wall of the temperature changing box is provided with an infrared signal window matched and connected with the collimator, and the other side wall of the temperature changing box is provided with a visible light signal window matched and connected with the theodolite; an adjusting support is arranged in the temperature changing box, and a thermal infrared imager is arranged on the adjusting support. The thermal infrared imager can be conveniently placed on the adjusting support in the temperature changing box, zero drift distances under different high-temperature and low-temperature states are measured and recorded into the controller, so that zero drift self-adaption of the thermal infrared imager under different temperatures can be realized, and the centers of discrete view field images of