The utility model discloses a fire hydrant with a valve stem wear-resistant protection structure, including a fire hydrant body and a valve stem disposed in the fire hydrant body, the upper end of the valve stem being provided with a valve stem joint for driving the valve stem to rise and fall, and a protection sleeve being provided between the valve stem and the fire hydrant body, the protection sleeve including a left semicircular sleeve and a right semicircular sleeve, the left semicircular sleeve and the right semicircular sleeve being rotatably connected to each other and being able to be配合套设在所述阀杆(2)的外部以分隔阀杆(2)与消防栓本体(1);所述阀杆(2)上设有沿其径向向内凹的凹部,所述凹部的底部对应于所述左半圆套件(4a)和右半圆套件(4b)分别设有定位柱(5),左半圆套件(4a)和右半圆套件(4b)上分别设有供对应定位柱(5)插设的定位孔(6),所述保护套(4)设置在所述凹部内且能够沿着阀杆(2)滑动并通过对应的定位柱(5)分別に定位左半圆套件(4a)和右半圆套件(4b),所述凹部的顶部对应于所述左半圆套件(4a)和右半圆套件(4b)还分别设有限位伸缩件(7),所述限位伸缩件(7)与阀杆(2)滑动连接且能够沿阀杆(2)径向伸缩以限制保护套(4)上下运动;所述阀杆(2)、消防栓本体(1)上还分别设有用于与所述保护套(4)紧密配合的第一密封圈、第二密封圈(10)。