The invention relates to a processing and recycling device for pulp residues. The device comprises a long-strip-shaped box body; the top of the box body is provided with a material inlet, and the material inlet is fixedly connected with one end of a discharge pipe; a horizontal fixing plate is fixedly installed at the inner top end of the box body, the top surface of the fixing plate is provided with a plurality of through holes, and the inner middle part of the fixing plate is provided with a horizontal cavity; the cavity communicates with the interiors of the through holes, the middle part of the inner wall of the bottom end of the cavity is provided with a through groove, and the bottom end of the through groove runs through the bottom end of the fixing plate; and telescopic plates arefixedly installed on the inner walls of two sides of the cavity, extension directions of the two telescopic plates are opposite, and first connection blocks are fixedly installed on the opposite endsof the two telescopic plates. The device disclosed by the invention can separate, recover and reuse fibers in the pulp residues, reduce an impurity content in water, is more convenient for sewage treatment, reduces sewage treatment load, is more energy-saving and environmentally-friendly, and can perform filtering without interruption, thereby further improving working efficiency.