The invention relates to the technical field of plastic granulating equipment, in particular to a novel plastic grain hot cutting machine head. The novel plastic grain hot cutting machine head comprises a machine head main body; one end of the machine head main body is provided with a feeding port; a neck mould is embedded in the other end of the machine head main body, and the center of the neck mould is connected with a centering shaft in a threaded mode; the exterior of the centering shaft is sleeved with chain wheels, springs and jam nuts in sequence, wherein the chain wheels are installed near the machine head main body; a blade is installed on a discharging port of the neck mould; and a heating ring is installed at the outer ring of the machine head main body. According to the novel plastic grain hot cutting machine head, the structure is simple, the design is reasonable, the operation is simple and convenient, the blade cuts off strip materials, the springs can guarantee that the blade is tightly attached to the neck mould to cut off the squeezed strip materials while the strip materials are hot, the operation is stable, the service life is long, frequent maintenance and frequent part replacing are not needed, and the use cost is lowered.