The invention relates to an integrated sewage treatment method which comprises the following steps in sequence: step I, actuating or conveying a sewage treatment device which can be moved and packaged in a frame to a place where sewage needs to be treated, collecting sewage, and adding a water treatment disinfectant; step II, carrying out separation in a sewage settling tank (1); step III, further adding a water treatment disinfectant into a mixed reactor (6) and introducing compressed air for separation; step IV, carrying out separation in a precipitate separator (3); step V, filtering with a water filter (4); step VI, filtering with an ultrafilter (5); step VII, filtering with an RO system water treater (7); step VIII, when treating sewage, conveying sludge in a sludge collecting box (92) into a sludge dehydrator (9) in the sewage treatment device through a sludge pump, so that the sludge dehydrator (9) can convey sludge to a sludge collecting vehicle or collecting bowl outside the sewage treatment device through a stepped conveyor (91), at the moment, the overall sewage treatment process is completed. The integrated sewage treatment method has the advantages that the occupied space is small, the carrying is convenient, the sludge removal effect is good, water resources are saved, and environmental protection is achieved.