Forming processing hole on printed circuit board

The utility model discloses a forming processing hole on a printed circuit board, comprising a circuit board and a forming processing hole arranged on the circuit board. The utility model is characterized in that the circuit board is formed by superposing four layers of inner plates; the forming processing hole is shaped like a rectangular tank; arc-shaped grooves extending towards the two sides of the forming processing hole are arranged at two corners at the bottom of the forming processing hole; and the arc-shaped grooves are processed by a milling cutter with diameter of 2.0mm. In the forming operation mode of the utility model, the milling cutter with diameter of 1.0mm is removed (or path use of the milling cutter with diameter of 1.0mm is reduced), the milting cutter fool-proof hole with fracture edge of 1.0mm is also removed, and existing Mickey mouse forming is modified into arc-shaped groove manufacturing and then the arc-shaped grooves can be processed by the milling cutter with diameter of 2.0mm. The milling cutter has high moving speed and long life, thus lowering the use cost, improving the forming operation efficiency, improving the processing efficiency by 16.7% and saving the processing time.