Automatic calibrating device for thermal meter

The invention relates to an automatic calibrating device for a thermal instrument, and belongs to the technical field of auxiliary devices of calibrating devices. Comprising a device body, a bearing plate is arranged at the bottom of the device body and slidably arranged in a protection component, the top of the protection component is rotatably connected with a sealing component, and the protection component and the sealing component are matched to seal the bearing plate and the device body; the protection component comprises a protection shell arranged on the peripheral side of the bearing plate. The bottom end of the protection shell is integrally and symmetrically provided with at least one set of supports. The bearing plate is slidably arranged between the baffle and the bottom end of the protective shell. A lead screw is connected to the side, facing the bearing plate, of the baffle, a motor is connected to the end, away from the baffle, of the lead screw, and the lead screw is in threaded connection wi