Waste treatment system for PCB

The invention relates to the technical field of circuit board recovery treatment, in particular to a waste treatment system for a PCB. The system comprises a first crusher for crushing the PCB into waste fragments, a second crusher used for crushing the waste fragments into waste particles, an airflow sorting machine used for dividing the waste particles into metal particles with high density and non-metal particles with low density, an electrostatic separator used for separating the metal particles from the non-metal particles, a magnetic separator used for removing iron from the metal particles, a third crusher used for crushing the metal particles subjected to iron removal into metal powder, a heating machine and a distillation machine. The heating machine is used for heating the metal powder, so that soldering tin is melted, copper and zinc are not melted, and the soldering tin is separated; and the distillation machine is used for distilling the metal powder after the soldering tin is separated, so that