The invention discloses an LED street lamp protection device which comprises an upright, a support shaft, a rotating shaft, a fixed shaft, a guide rod, fan blades, a fixing block, a connecting shaft,a transmission gear, a hollow gear, an extension block, a clamping block, a first fixing plate, a second fixing plate, a first spring, a support block, a rotating wheel, a limit rod, pull ropes, a
pulley, a covering plate, a second spring and a street lamp body. The LED street lamp protection device is simple in structure and convenient in operation; the covering plate is moved by pulling the pullropes at the bottom of the upright, a lampshade is favorably cleaned through a
brush on the top face of the covering plate, lighting effect is improved, high altitude cleaning is avoided for operators, and operation difficulty is reduced; protection of the lampshade by the covering plate is facilitated in windy weather through rotation of the guide rod and motion of the connecting shaft, damage to street lamps due to
weather effect is avoided, maintenance cost is reduced, and damage risk is avoided.