A wastewater treatment method

A wastewater treatment method is disclosed. The method includes feeding wastewater by a water feeding pump house into a rotational-flow sand sedimentation basin after the wastewater passes through a coarse grid to remove suspended solids in the wastewater; performing sedimentation in the rotational-flow sand sedimentation basin to remove fine sand in the wastewater; feeding the wastewater into ananaerobic tank after the wastewater after sand removal is subjected to hydrolytic acidification; feeding water discharged from the anaerobic tank into an oxidation channel; feeding the water discharged from the oxidation channel into a settling tank and performing solid liquid separation; feeding a liquid supernatant in the settling tank into a coagulation reaction tank; feeding sludge precipitated at the lower part of the settling tank into a sludge pump house; returning one part of the sludge in the sludge pump house back to the anaerobic tank; and discharging the other part of the sludge asresidual sludge into a sl