The invention discloses a pipeline inner liner manufacturing device. A feeding pipe of an inner liner material adopts a mode that the material is fed from the two ends, so that the uniformity of the fed material in the feeding pipe is improved, the weight of the feeding pipe is reduced, and the machining thickness of a pipeline inner liner is prevented from being influenced by the feeding pipe; telescopic devices are connected to a third support and a fourth support correspondingly so that the feeding pipe can move in a reciprocating mode in a pipeline through driving of the telescopic devices, and the coating uniformity of the inner liner material in the feeding pipe is further improved; and heating drying can be conducted in the coating process of the inner liner, and manufacturing efficiency is improved. The pipeline inner liner manufacturing device is simple in structure, convenient to use, good in inner liner machining uniformity, high in working efficiency and good in machined pipeline wear-resisting property.