Full-auto pipe belling machine expander with drawing device and program interface concerned is used with extruder. It is also used solitarily. While expanding pipes, the machine adopts translation. The action is steady and correct. It does not damage pipe material. The machine adopts double-infrared heating oven type. Each oven is equipped with heating core. The shaping method adopts expanding-end shaping. The size of pipe mouth is correct. On its panel, there is a transfer switch of expanding solvent type pipe socket(straight port) and expanding seal loop type pipe socket(R tyoe). He choice of expanding pipe types is very convenient. Its main electric control elements are exported. The system characteristics are steady and reliable.