Automotive rear windshield machining device

The invention relates to an automotive rear windshield machining device which comprises a grinding mechanism, a current breakdown mechanism, a welding mechanism and a detection mechanism which communicate with one another through a conveyor belt. An automotive rear windshield sequentially passes through the grinding mechanism, the current breakdown mechanism, the welding mechanism and the detection mechanism through the conveyor belt. The grinding mechanism comprises a grinding bracket and a grinding assembly, and the grinding bracket is located on the conveying path of the conveyor belt; thegrinding assembly is connected to the grinding bracket, so that the metal part of the automotive rear windshield is ground when the automotive rear windshield is conveyed to the grinding assembly; according to the automotive rear windshield machining device, visual compensation can be conducted at the position where a metal tongue piece or a button antenna is placed in the welding process; and thetemperature in the weldin