To make it possible to improve the efficiency of the recovery of copper resources and to reduce the size of a classification recovery treatment plant by force-cutting the lumps consisting of laminates formed by lamination of iron sheets and copper materials by a shearing blade.

This classification treatment method consists of a roughly shearing stage 1 for force-cutting the lumps wound with copper wires on the laminates formed by lamination of the iron sheets by the shearing blade and crushing theses lumps to copper chips and iron chips and a magnetic separating stage 2 for taking out the iron chips from the copper chips and iron chips obtd. by this roughly shearing stage 1 and classifies the copper chips and the iron chips. The lumps of the iron may be crushed by the shearing blade even if a crushing machine of an impact type is not used. Since the major iron components of motors are the iron sheets, even the shearing blade may be used for long time.