Visual inspection device for PCB (printed circuit board) drilling

The utility model discloses a PCB (printed circuit board) drilling visual inspection device, which belongs to the technical field of visual inspection and comprises a base, a connector is arranged on the base, an air inlet pipe is connected to the outer wall of the connector, an air supply pipe is arranged at the bottom of the connector and on the base, and an air outlet pipe is arranged on the air supply pipe. The air supply pipe is communicated with the connector, an inclined air jet head is arranged on the air supply pipe, a conveying device is arranged at the bottom of the base and used for conveying a PCB, a limiting device is arranged at the bottom of the side, away from the connector, of the base and used for pressing the PCB, and the limiting device comprises a second angle-adjustable connecting rod; and the end part of the connecting rod II is connected with a magnetic pressure foot. When the PCB reaches the base, the air spraying head blows out air to blow away chippings, dust or flashes on the PCB,