The invention discloses a microorganism degradation and aeration-extraction combined treatment station and a treatment method for oily sludge. The combined treatment station comprises a microorganismadding device, an aeration/extraction device, a counting-material feeding layer, a stirring layer, a material discharging layer and a caterpillar type material conveyer, wherein the microorganism adding device and the aeration/extraction device comprise a microorganism storage tank and an aeration-gas extraction storage tank; the counting-material feeding layer comprises a valve, a pressure gauge,a flowmeter, a material feeding chamber and the like; the stirring layer mainly comprises all pipeline connection port devices and stirrers; and the material discharging layer is mainly used for transporting treated soil away from the treatment station through a truck. The device disclosed by the invention can remove petroleum, petroleum hydrocarbon, VOCs (Volatile Organic Compounds) and degradable and extractible pollutants from the oily sludge through combined methods such as microorganism degradation, mechanical stirring and aeration-gas extraction, so that aims of soil repairing and large-scale automatic treatment are fulfilled.