Automatic calibrating device for hygrothermograph

The utility model discloses an automatic calibrating device for a hygrothermograph, which comprises a temperature and humidity calibrating box body, a first fixing plate is arranged inside a box chamber of the temperature and humidity calibrating box body, a second fixing plate is arranged below the first fixing plate, and two sides inside the first fixing plate are rotatably connected with driving shafts. One end of the driving shaft on one side in the first fixing plate penetrates through the inner wall of the upper portion of a box chamber of the temperature and humidity verification box body and extends to the position above the temperature and humidity verification box body, a transmission mechanism is arranged between the first fixing plate and the second fixing plate, and a driving mechanism is arranged above the temperature and humidity verification box body. According to the temperature and humidity verification box, the problems that in the prior art, a temperature and humidity verification box is o