Floor expansion screw rod mounting tool

The utility model relates to a floor expansion screw rod installation tool which solves the technical problems that in the prior art, an installation tool of a floor connecting piece is unstable in supporting in the using process, and palms of workers are prone to being abraded. The device comprises a cross rod, a vertical rod, a nut sleeve and a movable sleeve, the lower end of the vertical rod is vertically and detachably connected with the cross rod, the length of the vertical rod is adjustable, the lower end of the nut sleeve is detachably connected with the upper end of the vertical rod, the nut sleeve and the vertical rod are coaxially arranged, and a clamping groove with an upper opening is formed in the upper portion of the nut sleeve. The clamping groove is matched with a nut of the expansion screw rod, the nut sleeve is used for driving the nut of the expansion screw rod to rotate through the clamping groove, the vertical rod is rotationally sleeved with the movable sleeve, and the vertical rod is p