The invention discloses a coiling shaft enabling convenient cutting of a glass fiber reinforced ring. The coiling shaft comprises an elastic center shaft, and a plurality of annular circular barrels which sleeve the center shaft, wherein each circular barrel comprises an inner ring and an outer ring; a rolling ball is arranged between each inner ring and the corresponding outer ring; an inner hole of each inner ring is in match with the center shaft; the section of the center shaft is noncircular; the center shaft is at least provided with a stopping ring on one side of each circular barrel; embedding blocks through which adjacent circular barrels can be embedded to each other are arranged on the outer rings; detachable positioning devices are arranged between two outer rings at the outermost side and the center shaft; a lifting plate is arranged between every two circular barrels; rotating shafts are hinged with two sides of the lifting plates; the other end of each rotating shaft is hinged with the corresponding inner ring; elastic devices on which blades are arranged are mounted on the lifting plates; two ends of the center shaft are connected to movable brackets; clamping devices for clamping the outer rings are arranged on the brackets. According to the coiling shaft, the reinforced ring is cut and then separated, so that the glass fiber reinforced ring can be conveniently cut and separated.