The utility model discloses a radial gate quick installation device of free bearing foundation bolt, including mutual parallel arrangement's preceding foundatin plate and back foundatin plate, and preceding foundatin plate passes through connecting section steel fixed connection with the back foundatin plate, be equipped with on the preceding foundatin plate and arrange according to radial gate the free bearing foundation bolt mode of arranging, and the aperture slightly is greater than a radial gate free bearing basis bolt external diameter's preceding mounting hole, be equipped with on the back foundatin plate with the same back mounting hole of preceding mounting hole position one -to -one and aperture, the thread end that makes a radial gate free bearing foundation bolt passes behind back mounting hole and the preceding mounting hole in the front the foundatin plate both sides in proper order, and to pass through the nut fixed to make the welding ends of a radial gate free bearing basis nut stay the back foundatin plate outside. The utility model discloses guaranteed the assembly precision of a free bearing foundation bolt, simplified hoist and mount work volume, reduced high altitude construction's time, improved the efficiency of construction, reduced installation cost, and simple manufacture has, the practicality is strong, convenient to detach and characteristics such as use repeatedly.