Bottle preform heating apparatus

A bottle preform heating apparatus, comprising a cavity, a top cover, a plurality of heating lamps, a plurality of heat insulation rings, a bottom plate and an exhaust pipe, wherein a first receiving cavity and a second receiving cavity are formed in the cavity, the first receiving cavity is cylindrical, the second receiving cavity is connected to a side surface of the first receiving cavity, each of the plurality of heating lamps comprises a lamp tube and a lamp base, the lamp tube comprises an arc portion and two connection portions, an end of each connection portion of the two connection portions is connected to the lamp base, another end of the each connection portion is connected to an end of the arc portion, the arc portion is disposed in the first receiving cavity, the two connection portions and the lamp base are disposed in the second receiving cavity, the top cover is disposed on top of the cavity, the top cover is provided with a first through hole, a preform tube of a bottle preform is configured to pass through the first through hole so as to be inserted into the first receiving cavity and surrounded by the arc portion, a radius of the first receiving cavity is less than a distance between an end of a handle of the bottle preform facing away from the preform tube and a central axis of the preform tube, wherein a heat insulation ring of the plurality of heat insulation rings is configured to be placed between two adjacent lamp tubes to surround a periphery of an arc portion of each of the two adjacent lamp tubes, the plurality of heat insulation rings are spaced apart from an inner wall of the cavity so that a heat insulation cavity is formed between the plurality of heat insulation rings and the cavity, a bottom of the cavity is disposed on the bottom plate, the exhaust pipe is detachably connected to the bottom plate, the bottom plate is provided with a second through hole, and the exhaust pipe passes through the second through hole and is inserted in the first receiving cavity.