The invention discloses an insulated truck roof special for high-temperature hot billet transportation. The insulated truck roof comprises a truck roof end wall, truck roof side beams, truck roof bent beams and a plurality of liner installing supports, wherein the liner installing supports are parallelly arranged in the longitudinal direction of a truck body, the adjacent liner installing supports are connected through at least two longitudinal beams, two ends of the liner installing supports in the transverse direction are connected with the truck roof side beams, a whole truck roof framework forms a grid beam frame structure, the lower portions of the liner installing supports are connected with truck roof liner plates, the upper portions of the liner installing supports are connected with the truck roof bent beams, truck roof plates are laid on the truck roof framework, and the cavity formed by the truck roof liner plates and the truck roof plates is filled with a heat insulation material. The insulated truck roof is of a double-layer sandwich structure, is low in manufacturing process difficulty, has stronger rigidity and strength, is convenient and quick to open and close, has a good airtight heat insulation effect and can be applicable to safe loading transportation of billets of 700 DEG C or below of iron and steel enterprises, and the unloading temperature is not higher than 400 DEG C.