PIN pressing device and PCB drilling machine

The invention relates to a PIN pressing device which is used for conducting PIN pressing operation on a machined plate, the machined plate comprises a first plate and a second plate covering the first plate, a positioning piece is arranged on the side, close to the second plate, of the first plate in a protruding mode, and the PIN pressing device comprises a workbench assembly and a PIN pressing assembly. The workbench assembly is installed on the rack and used for bearing and fixing a machined plate. The PIN pressing assembly comprises a pressing head and a first driving piece; the pressing head can be driven by the first driving part to move close to the second plate in the thickness direction of the second plate so that the second plate can be tightly pressed on the first plate on the periphery of the positioning part. Due to the fact that the PIN pressing device does not need to conduct PIN pressing operation in a manual hammering mode, manual operation steps are reduced, the automation degree and product