Protective device for outdoor fire hydrant

The protection device for the outdoor fire hydrant comprises a fire hydrant body, and protection assemblies are arranged on the periphery of the fire hydrant body; the protection assembly comprises two threaded cylinders, fixing rods are arranged on the inner sides of the two threaded cylinders, screwing threads are formed in the bottoms of the outer sides of the two fixing rods, the fixing rods and the inner sides of the threaded cylinders are connected in a screwed mode through the threads, and the two fixing rods are rotationally connected through two stabilizing plates. The two stabilizing plates are fixedly connected through a plurality of protective rods, and the protective rods are sleeved with protective cylinders; according to the scheme, impact force is blocked and buffered through the protection barrel, the fixing rod, the stabilizing plate and the protection rod, the protection barrel and the protection rod rotate, the impact force can be relieved, and therefore the protection effect on the fire h