Connecting device for fatigue test of expanded-base anchor cable foundation of wind driven generator

The invention discloses a connecting device for the fatigue test of an expanded-base anchor cable foundation of a wind driven generator, and solves the problems in the prior art that the fatigue testfails, the test accuracy is poor and safety production is affected due to high-frequency abrasion. The device comprises a plurality of steel strands arranged in a vertical hole in an underground rockstratum. The device is characterized in that a strand connecting end is arranged on the upper part of one section, located above the ground, of each steel strand, and the strand connecting ends of thesteel strands are connected with a working anchor disc; a connecting sleeve is arranged above the working anchor disc, the lower end of the connecting sleeve is connected with the working anchor disc, and the upper end of the connecting sleeve is connected with a fatigue testing machine loading plate through a connecting rod; a locking nut is arranged on the connecting rod, and a loading nut is arranged on the upper side o