Punching tool for circuit board

The utility model discloses a punching tool for a circuit board, which belongs to the field of circuit board processing and comprises a processing table and a support frame, the support frame is fixedly connected to the top of the processing table, and a punching cylinder is fixedly connected to the top of the support frame. The output end of the punching air cylinder penetrates through the supporting frame and is fixedly connected with a fixing frame, an adjusting assembly is arranged in the fixing frame, four sets of mounting blocks are arranged at the bottom of the adjusting assembly, and punching nails are connected to the bottoms of the four sets of mounting blocks. Four bases are arranged at the top of the machining table, the positions of punching nails are adjusted through rotation of longitudinal lead screws and transverse lead screws, circuit boards of different sizes can be punched conveniently, meanwhile, punching seats are driven to move synchronously when the punching nails move, discharging hol