The single-shaft shredder is composed of a movable knife plate and a static knife, which completes the function of shredding materials. The cutter head is composed of a base shaft and several movable cutter blocks in the shape of a quadrilateral. The movable knife block has 4 cutting edges, which can be replaced. The movable knife blocks are arranged in V-shaped multiple rows along the base shaft, and are fixed on the base shaft with screws, and rotate together with the base shaft to form a movable cutter head. There are two sets of static knives, which are fixed on the frame.The waste material is driven by the horizontal hydraulic cylinder to the direction of the cutter head. The speed is stable and adjustable, and the propulsion force is large and uniform. It is suitable for recycling all kinds of large solid materials, irregular and difficult-to-handle materials, plastic containers and plastic barrels, tubes, films, fibers, paper, etc. The spindle speed is 45~100 rpm, stable work and low noise.