The invention discloses an iron tower reinforcing device. A ground anchor bolt reinforcing device is used for fixing an iron tower. The iron tower reinforcing device comprises ground anchor bolts, theground anchor bolts are fixedly connected with the iron tower, and the bottom end of the iron tower is positioned in concrete. The iron tower reinforcing device also comprises a plurality of positioning steel plates, a plurality of first carbon fiber sticking strips, a plurality of second carbon fiber sticking strips and a plurality of third carbon fiber sticking strips. the positioning steel plates are fixedly connected with the iron tower, the second carbon fiber sticking strips are stuck on the positioning steel plates, the first carbon fiber sticking strips are fixedly connected with thethird carbon fiber sticking strips through the second carbon fiber sticking strips, the first carbon fiber sticking strips and the third carbon fiber sticking strips are attached to the iron tower, horizontal carbon fiber cloth is wound around the joints of the two ends of the positioning steel plates and the iron tower, and the horizontal carbon fiber cloth is wound around the upper sides of thefirst carbon fiber sticking strips and the lower sides of the third carbon fiber sticking strips. The fiber sticking strips, the horizontal carbon fiber cloth and the positioning steel plates are adopted for reinforcement, fixation is firmer, the original structure is not affected, construction is easy and convenient, and the work amount is small.