Variable pore aeration hose is a hose made of synthetic fiber reinforced modified plastic material, with micropores drilled around the hose. During operation, the hose swells and the micropores open during aeration. When it stops running, the hose is flattened by static water pressure, which to some extent avoids sludge backflow. Suitable for oxygen supply in aeration tanks of various sewage treatment projects; The sewage regulating tank is used for mixing and pre aeration to prevent the deposition of large sediment particles.