The utility model discloses a mounting tool is buckled to rack screw back of body, including the action bars, the preceding tip of action bars is equipped with the connecting rod that sets up to the slope of action bars upside, and the contained angle of connecting rod AND operation pole is 10 degree-45 degree, and the connecting rod downside is equipped with to detain buckles the fixture block in the draw-in groove into the screw back of the body, and the fixture block is cylindricly, installs power and LED lamp on the action bars, is equipped with control switch on the action bars the installation is put in and is installed LED lamp and LED lamp angularly adjustable, is convenient for operate under the narrow and small space illumination circumstances inadequately, improves the convenience of using when the installation was buckled to the screw back of the body, rack rear end clasping was followed in the square hole of rack to one of them draw-in groove of buckleing the screw back of the body with the hand earlier, the another hand with the utility model discloses following the square hole front end and inserting, utilize the action bars, another draw-in groove chucking is buckled with the screw back of the body to the slope structure between connecting rod and the fixture block, then puts forth one's strength and pull out the cramp rapidly, can accomplish quick installation, labour saving and time saving, and operation safe and reliable, work efficiency improves greatly