PCB (printed circuit board) collecting and releasing machine

The invention relates to the technical field of PCB collecting and releasing machines, in particular to a PCB collecting and releasing machine which comprises a working table, two vertical plates are vertically and symmetrically arranged on the working table, conveying belt conveying mechanisms are arranged at the bottoms of the opposite sides of the two vertical plates, cavities are formed in the vertical plates, sliding grooves are formed in the two sides of each cavity, sliding blocks are slidably connected into the sliding grooves, and the sliding blocks are arranged in the sliding grooves. A rotating shaft is rotationally arranged between the two sliding blocks, a displacement driving mechanism for driving the sliding blocks to move along the sliding grooves is arranged on the vertical plates, a plurality of movable grooves communicated to the cavity are formed in the sides, close to each other, of the vertical plates, the rotating shaft is fixedly sleeved with a plurality of material carrying blocks, an