External protection and dust prevention mechanism for LED lamp

The utility model relates to the technical field of LED lamps, in particular to an LED lamp external protection and dust prevention mechanism which comprises a device body and a lamp holder, an LED lamp body is fixedly installed at the top end of the lamp holder, a transparent protection shell is movably installed at the top end of the LED lamp body through threads, and the dust prevention mechanism comprises a through hole. And a plurality of through holes are uniformly formed in the outer side of the transparent protective shell. Through the arrangement of the transparent protective shell, the through hole, the movable strip and the sponge strip, dust in air entering the transparent protective shell can be blocked and filtered to a certain extent through the through hole during use, and when much dust is accumulated on the outer side of the transparent protective shell, the movable strip can be held to pull up and down, so that the dust in the air can be removed. At the moment, the movable strip slides up a