The invention provides a sewage disposal tank integrating diversified processes of Orbal, bio-dopp, MBBR and MBR. The sewage disposal tank comprises a tank body, the tank body is internally provided with compartment plates which sequentially divide the tank body into an anaerobic zone, an anoxic zone, an aerobic zone, a sedimentation zone and a membrane filtration zone, water via holes are formedin the compartment plates, the tank body is provided with a water inlet and a water outlet, the water inlet is located in the anaerobic zone, and the water outlet is located in the membrane filtrationzone; the volume ratio of the anaerobic zone to the anoxic zone to the aerobic zone is (18-25):(25-35):(45-60), sewage in the aerobic zone flows back to the anaerobic zone through a sludge reflux pipe, and the membrane filtration zone is provided with an MBR membrane which is an MBR dynamic membrane, an MBR flat membrane or an MBR curtain membrane; carriers are arranged in the anaerobic zone, theanoxic zone and the aerobic zone respectively. The sewage disposal tank integrating diversified processes of Orbal, bio-dopp, MBBR and MBR has the advantages of being small in occupied area and highin disposal efficiency and effluent quality.