Gas pipeline on-line intelligent cutter

The utility model relates to a gas pipeline on-line intelligent cutter which can solve the problems of easy damagement that cutting tools are easily damaged and can not exit when fault takes place. The utility model comprises an outer tube (1), a linking pipe (2), a sealed tube (3), a transmission shaft (4), a large gear (5), a planetary gear (6), a pinion (7) which matches with the large gear (5), and generators (8, 9). The utility model is characterized in that an inner pipe (10) is sheathed in the outer pipe (1); a fixed plate (12) which is out of the inner pipe is connected with the planetary gear (6) by a linking frame (11); the two ends of a harmonic reducer (13) are connected with the pinion (7) and the generator (9) respectively. Out of the inner pipe (10), a compound worm (14) is arranged on the fixed plate (12) which is connected with the transmission shaft (4); the two ends of a photoelectric follow-up device (15) are connected with a compound worm (14) and a trolley (16) respectively; a plasma cutting torch (17) is connected with the trolley (16), and the generator (8) is connected with the compound screw (14); a binding clasp (18) is connected with one end of the transmission shaft (4), and a computer (19) is connected between the generator (8) and the generator (9) by a conductor (20).