The single hole membrane aerator is not affected by the temperature difference in the tank, the height of the filter, or the porosity of the biological ceramic filter material. The bubble diameter is small and the distribution range is large. The aerator outlet is designed with a unique concave convex structure, which is not easily blocked and not afraid of the pressure of the biological ceramic filter material. Due to its unique structure, it is necessary to follow the relevant requirements during installation and use. The assembled single hole membrane aerator is installed on top of the filter brick and pebble layer. When the membrane works, there is no need to worry about the accumulation pressure of the filter material affecting its free expansion. It can safely provide oxygen to microorganisms attached to the filter material. Its operation mode can be continuous or intermittent.