The invention relates to a pipe welding arc-shaped liner device. According to the aim, a liner device which can be used for improving the welding quality during pipe construction is provided. The pipewelding arc-shaped liner device is characterized by comprising six sets of head support opening alignment components, a head liner guide and push component, a middle barrel rod connecting component and a tail push and pull positioning component; each set of head support opening alignment components comprises a fixed jackscrew, a wearable steel ball, a plurality of distance adjusting gasket, a steel ball barrel and a steel ball base; the head liner guide and push component comprises a support barrel, a sliding ring, a compression spring, a fixing ring, a guide rail rod, a sliding support, an arc-shaped liner, a limiting bolt and a nut; the middle barrel rod connecting component comprises a connecting barrel, a barrel coupling, a connecting rod and a rod coupling, and the middle barrel rodconnecting component is used for connecting the head and the tail of the device and transmitting rotation or push-and-pull motion of the tail; and the tail push and pull positioning component comprises a push-and-pull handle and a clamping reed.