High-cleaning-rate sorting process method suitable for decoration garbage

The invention relates to the technical field of decoration garbage sorting, in particular to a high-cleaning-rate sorting process method suitable for decoration garbage, which comprises the following steps: transferring the decoration garbage into a drum bag breaking machine for bag breaking treatment, and enabling the dispersed decoration garbage to enter a 3D drum screen to be divided into large-particle-size garbage and small-particle-size garbage; the large-particle-size garbage is put into a magnetic separator to be subjected to magnetic separation and then conveyed into a ventilation chamber to be subjected to winnowing, meanwhile, the small-particle-size garbage is transferred into a 3D combined stepped sieve to be screened, a first screened object, a second screened object and a third screened object are obtained, the first screened object is put into the magnetic separator and then put into a winnowing machine to be screened, and the third screened object is obtained; and meanwhile, waste metal is sc