The invention provides a conveyor. The conveyor comprises a rack body, a transmission device and a heating chamber. The transmission device is transversely arranged in the middle of the upper surface of the rack box and composed of a transmission chain, chain wheels, a belt and a motor, the two ends of the transmission chain are installed on the chain wheels, and the motor is connected with the chain wheels through the belt. The heating chamber is arranged over the transmission device and comprises a hot water room, a steam room, a hot water nozzle and a steam nozzle, the hot water nozzle and the steam nozzle penetrate in from the position above the hot water room and the position above the steam room respectively, and heat insulation curtains are arranged at the two ends of the heating chamber. A return water tank is placed under the transmission device. A packager further comprises a water tank. Heating pipes are arranged in the water tank, the hot water nozzle is connected with the water tank through a first water pump and a pipeline, the steam nozzle is connected with the water tank through a pipeline, and the return water tank is connected with the water tank through a second water pump and a pipeline. The conveyor has the advantages of being convenient to use and good in heating shrinkage effect and increasing the resource utilization rate.