The invention discloses a mobile turning block, which comprises a first guiding pulley, a first pulley yoke, a second guiding pulley and a second pulley yoke. The first guiding pulley is hinged at thefirst end of the first pulley yoke; the second guiding pulley is hinged at the first end of the second pulley yoke; the second end of the first pulley yoke is provided with a first pin for locking oropening the first pulley yoke; the first pin is hinged at the first end of a turning shaft and realizes 360-degree rotation around the end; the second end of the second pulley yoke is provided with asecond pin for locking or opening the second pulley yoke; and the second pin is hinged at the second end of the turning shaft and realizes 360-degree rotation around the end. The device is simple tooperate, improves work efficiency, safety of the replacement work and management efficiency, reduces work risk, and effectively solves the problems of inclination of a flying vehicle and stress of a single wheel in the process of ground wire breakage and anti-shock hammer displacement defects due to restoration of large-sag ground wire in the line work.