The present invention relates to environmental protection field, it's a kind of processing method of micro-processing biochemistry closestool, including closestool shell body, water saving flushing device, sewage cavity, crushing lifter, solid-liquid separator, sludge oxidation processor, intermediate water room, the biologic membrane purifier, sludge room, input electrical source, microcomputer controller and human body induction type of trigger. The cubage of the present invention is cabinet, it is automation, flexible to install, convenient to use, water-saving, economical and environmental protection, so it has high market promoting value.