The invention discloses a processing device for a water temperature sensor. The processing device comprises a device body, a hydraulic cylinder, a punching station, an air pump, a workbench, illuminating lamps and a controller; and is characterized in that the device body is arranged on bottom feet and provided with material boxes, guide rails and lamp holders, the hydraulic cylinder is arranged at the top of the device body, the punching station is arranged in the hydraulic cylinder, the air pump is arranged in the bottom of the device body and provided with a pneumatic tube, a blowing tube and slide blocks are arranged on the workbench, the slide blocks are connected to the guide rails respectively, the illuminating lamps are arranged in the lamp holders respectively, and the controller is arranged on the device body and provided with operating buttons and a touch screen. According to the invention, the device body is provided with multiple material boxes, the material boxes are provided with label areas respectively, the label areas can be used to mark names of parts in the corresponding materials boxes, operators are avoided from taking accessories for mistake, and the processing efficiency of the water temperature sensor is improved.