¡¡ screw plant-shaped chipping machine can cut log and small diameter log with less than 200mm diameter and is applicable to paper pulp factory, forest tree factory, paper mill, thermal power plant, etc. chipping machine is mainly composed of four parts such as principal machine, coupling, bottom frame and motor, etc, in which the principal machine of chipping machine is composed of cutter head, upper and lower covers, feed inlet and outlet, etc.