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The utility model relates to a kind of welding spot detection devices for inverter welding processing, including welding tooling and detection piece, welding tooling fixedly arranged, for embedding the PCB board to be processed, and for welding treatment to the PCB board to be processed;Detection piece is installed below welding tooling, for detecting the back of the PCB board to be processed.The beneficial effects of the utility model are simple structure, reasonable design, and the operator can monitor the PCB back welding point state during welding process, avoid secondary detection, easy to operate, and low detection cost.