The utility model relates to an anaerobic hydrolysis-aerobic-settling separation integrative waste water processing reactor, a guide cylinder of an air elevating type inner circular current bioreactor is positioned at the center of a tower body, two net-shaped supports are fixed on the guide cylinder and the tower body by dividing into an upper support and a lower support, a biological carrier stuffing is filled in a space formed by two net-shaped supports, a gas distributer is positioned at the bottom of the guide cylinder; a settling tank external cylinder of a vertical stream type settling separator is of a cylinder-shaped structure with the diameter larger than that of the tower body, both are connected into a whole by a conic cylinder, the opening of a horn-shaped cylinder under the settling tank internal cylinder is positioned in the conic cylinder, an upper cylinder is positioned in a guide slot, the guide slot is covered above the settling tank inner cylinder and is fixed by an overflow slot board on an inner wall of the settling tank external cylinder, the settling tank is a space formed by the settling tank external cylinder and the guide slot, a sludge returning port is arranged at the bottom of the settling tank; the reactor can reinforce the cooperating actions between hydrolysis acidification and aerobic degradation, the processing efficiency and the integration degree are high, the floor area is small, and the excess sludge amount is low.