The utility model discloses an LED illuminating lamp for a clean room, which includes an illuminating lamp body, an outer frame and a base plate, wherein the illuminating lamp main body is fixed between the outer frame and the base plate; the outer frame adopts an integral structure; a bracket is further mounted on the base plate; and a plurality of mounting holes are arranged in the bracket. The LED illuminating lamp solves the problem in the prior art that dust is easy to accumulate at gaps as the outer frame of the illuminating lamp is spliced for assembly, eliminates the splicing gaps on the outer frame, prevents dust from accumulating at the gaps and guarantees the cleaning degree in the clean room due to the fact that the outer frame of the illuminating lamp is designed to be an integrated structure, can be fixed on the wall conveniently through the bracket on the back of the illuminating lamp, and is simple and efficient to install.