To stop rolling without deteriorating the precision of a product dimension by restraining an inertia rotation of a crank after a cutting command to a main clutch in a rolling stop of a cold Pilger mill.

When rolling is stopped, a main motor is decelerated so that a crank is rotated at a rotating speed (x) which is set to x1≤x<x2 (rpm), the feed of a pipe stock is stopped when a feed carriage is transferred up to a prescribed position (m), the main motor is simultaneously decelerated again until the rotating speed of the crank becomes x1, the main motor is decelerated until the rotating speed of the crank becomes zero rpm to stop the crank when a crank detecting angle p2 which is set so as to stop a roll stand at an optional position p1 is reached, the crank is braked at a point in time in the vicinity of p1 during the crank is decelerated, and the main clutch is cut after the crank is stopped. Hereupon, x1 expresses a rotating speed setting value of a crank with which a conventional main clutch is let in and released. (x) expresses a rotating speed of the crank with which the above range is satisfied and moreover by which the dimensional precision of a product is not affected even though it is rolled at the above speed.