The invention provides an automatic rotating anchoring machine, and relates to the technical field of the design of construction machinery for automatically rotating a rotating type ground anchor to an underground position by using a mechanical method. The automatic rotating anchoring machine comprises a machine frame, a support device, a power conversion mechanism, a transmission mechanism, a hand wheel speed regulating device and a power device, wherein groove-shaped walking rails are arranged at the two sides of the machine frame, the power conversion mechanism comprises a hydraulic motor, an anchor rod clamping device and a host machine support frame, the hydraulic motor is connected with a speed reducing box, guide devices are respectively arranged between the walking rails arranged at one corresponding side and the two sides of the host machine support frame, the transmission device comprises an upper shaft, a driving shaft and a lower shaft, a first chain is connected between the lower shaft and the driving shaft through a chain wheel, a second chain is connected between the lower shaft and the upper shaft through a chain wheel, the two end parts of the second chain are respectively connected with two chain connecting devices corresponding to the back side of the host machine support frame, and the power device is connected with the hydraulic motor through a rubber pipe. The automatic rotating anchoring machine has the advantages that the structure is simple and reasonable, the labor productivity is liberated, the construction cost is reduced, and the construction work efficiency is greatly improved.