The utility model provides a sword is jack -up instrument for tower. This sword is jack -up instrument for tower includes the base be equipped with rotatable chassis on the base, play to rise the device, set up just can be in vertical side's rebound on the chassis, the crossbeam sets up play to rise the top of device and can move on the horizontal direction, the davit, including perpendicular arm and cantilever, the one end of perpendicular arm with the tip swivelling joint of crossbeam, its other end with cantilever swivelling joint. The utility model provides a pair of sword is jack -up instrument for tower, its compact structure, the dismantlement and the installation of the tool setting tower of being convenient for.