The invention discloses a microporous membrane aeration disc. The aeration disc comprises a base frame and a microporous membrane pipe arranged on the base frame, wherein the base frame is provided with an air suction interface communicated with an inner cavity of the microporous membrane pipe, and the outer wall of the microporous membrane pipe is provided with exhausting micropores communicated with the inner cavity of the microporous membrane pipe. According to the microporous membrane aeration disc, aeration is carried out by adopting the microprous membrane pipe, the process of the microprous membrane pipe is mature, the materials are easily available, the processing and manufacturing are convenient, and meanwhile, the diameters of the exhausting micropores in the microporous membrane pipe are small, and the generated aeration bubbles are relatively small when the disc is in use, so that the contact area of gas and a water body is effectively increased, the dissolving efficiency is improved, and the waste is reduced.