Dustproof noise reduction protective cover

The utility model provides a dustproof noise reduction protective cover which comprises a protective sleeve and a fixing block, the protective sleeve is hollow, one end of the protective sleeve is an open end, the other end of the protective sleeve is provided with a connecting hole, a spring is arranged in the protective sleeve, and the wall of the spring is matched with the inner wall of the protective sleeve in an abutting mode. The fixing block is arranged on the inner side of the other end of the protective sleeve, the fixing block is fixedly connected with the protective sleeve and the spring, a fixing hole corresponding to the connecting hole is formed in the fixing block, the diameter of the fixing hole is larger than that of the connecting hole, and a water absorption sponge is arranged on the inner wall of the protective sleeve. And the drilling operation cover is arranged in the protective sleeve, so that dust raising is avoided, and a certain noise reduction effect can be achieved. 本实用新型提出了一种防尘降噪防