The invention discloses a filter type disc type microporous aerator provided with a rubber diaphragm. The filter disc type microporous aerator comprises a main body, a
check valve, a diaphragm, an expansion ring, a gland and a wedge, wherein the
check valve is arranged in an air inlet; a
steel ball is arranged in the
check valve, and the diaphragm and the expansion ring are arranged at the upper end of the check valve sequentially; the diaphragm and the expansion ring are fixedly connected through the gland, micropores are formed in the diaphragm, the wedge and the main body are connected on an
aeration conduit in a matched manner, a filter is arranged at the lower end of the check valve, and a seal ring is arranged at the upper end of the check valve in a sleeving manner. By mounting the check valve,
sewage can be effectively prevented from entering a ventilating duct
system, and the service life of the product is prolonged; by arranging the filter at the lower end of the check valve, an air outlet can be effectively prevented from being blocked by
foreign matter in the pipeline, an inlet of the filter is prevented from being blocked by the
foreign matter by aid of the conical
shape design of the filter, and accordingly, stable operation of the
system is guaranteed.