Expansion joint width adjusting mechanism

The utility model discloses an expansion joint width adjusting mechanism which comprises an adjusting block, the left side of the adjusting block is fixedly connected with a reverse screw, the right side of the adjusting block is fixedly connected with a forward screw, the reverse screw is in threaded connection with a first nut, and the middle of the bottom of the first nut is fixedly connected with a first connecting block. According to the utility model, the adjusting block is rotated, and the reverse screw rod and the forward screw rod rotate along with each other in the rotating process of the adjusting block, so that the first nut and the second nut relatively move on the reverse screw rod and the forward screw rod under the action of threads of the first nut, the second nut, the reverse screw rod and the forward screw rod; corresponding mechanisms at the bottoms move together in the moving process of a first nut and a second nut, so that an adjusting block is continuously rotated, a fixed telescopic st