The invention belongs to the technical field of plastic pipes, and particularly relates to a continuous production device and method for a glass fiber reinforced belt polyethylene composite pipe. A main structure of the production device comprises a first extruder, an inner pipe die, a vacuum sizing box, a first cooling spraying box, a first tractor, a first winding machine, a first heater, a second winding machine, a second heater, an automatic belt replacing mechanical arm, an outer pipe extruder, an outer pipe extrusion die, an outer pipe cooling sizing die, a second cooling spraying box, a second tractor, a meter counter, a fixed-length cut-off machine and a finished pipe containing frame. The technology process of the production method comprises total four steps of inner pipe extrusion forming, continuous composite belt winding, outer pipe extrusion wrapping and cutting warehousing, and continuous online production of the glass fiber reinforced belt polyethylene composite pipe is achieved. According to the production device for the glass fiber reinforced belt polyethylene composite pipe, the using environment is friendly, the production method principle is scientific and reasonable, the produced and prepared glass fiber reinforced belt polyethylene composite pipe is high in compression strength and small in pipe thickness, the production cost is low, and energy saving and environment friendliness are achieved.