The utility model discloses a wood plastic plate heating box, belonging to the field of wood plastic plate production and processing. The wood plastic plate heating box comprises a box body and a box cover, wherein the box body and the box cover are connected through a cylinder; a transfer roll is arranged at the upper opening of the box body; and heating devices are respectively arranged in the box body and the box cover. The wood plastic plate heating box disclosed by the utility model is applied to wood plastic plate production and processing equipment, so that the defect that a thin wood plastic plate is easily cooled and deformed in air in the production and processing process in the prior art is overcome.