The invention discloses a wood chipper and relates to the technical field of wood processing. The wood chipper comprises a housing installed on a rack, wherein the housing is provided with a feeding port and a discharging port, a rotary cutter roller is installed in the housing, multiple chipping cutters are radially distributed on the rotary cutter roller, and the rotary cutter roller is in driving connection with a motor. A feeding conveying belt is installed at the feeding port, and a wood spreading roller is installed above the discharging end close to the feeding conveying belt. The feeding port is provided with an obliquely arranged feeding guide plate, and the feeding guide plate extends to the discharging port. A discharging conveying belt is installed at the discharging port. Compared with the prior art, woods conveyed by the feeding conveying belt are spread uniformly through the wood spreading roller, wood feeding is uniform, the cutters are prevented from getting stuck, andthe service life of the chipping cutters is prolonged. Wood materials are conveyed by adopting the feeding conveying belt, and the production efficiency is remarkably improved.