Movable u-bolt fastening tool

The utility model relates to a movable u-bolt fastening tool. The movable u-bolt fastening tool comprises a first square frame and a second square frame which are vertically and concentrically arranged and are the same in shape. The area of the first square frame is smaller than that of the second square frame, and the first square frame and the second square frame are connected through two corresponding rectangular pipes. The length of the rectangular pipe is adjustable, springs for hooking a pneumatic impact wrench are arranged in the centers of four edges of the first square frame, and four universal wheels are arranged below the second square frame. By means of the technical scheme, the pneumatic impact wrench is hoisted through the springs on the first square frame, and the distance between the pneumatic impact wrench and the ground is adjusted through the length of the rectangular pipes so that the pneumatic impact wrench can adapt to different vehicle models, an operator can directly sit on a seat to tightly beat a u-bolt from bottom to top, the labor intensity of the operator is low, the working efficiency is improved, and meanwhile the assembling quality is guaranteed.