The invention provides an integrated partial nitrosation-anaerobic ammonium oxidation slant plate enhanced bioreactor. The main structure of the bioreactor is cubic and is sequentially divided into anaerobic zone, a transition zone, an anaerobic zone, a diversion zone and a separation zone from left to right. The bioreactor includes a water inlet pipe, a compartment double-side water distributor,a micro-hole aeration pipe, an aerobic zone sludge draining pipe, a transition zone and anaerobic zone sludge draining pipe, a separation zone sludge draining pipe, a reflow pipe, an aerobic zone andtransition zone exhaust pipe, an anaerobic zone exhaust pipe, a separation zone exhaust pipe, a water outlet groove, a water outlet pipe, a baffle, a combined slant plate I, a combined slant plate IIand a slant plate. According to the bioreactor, autonomous deployment among the functional zones can be achieved, the poisoning influence of aeration on anaerobic functional microorganisms is completely avoided, the effect of separating sludge from water is greatly improved, and the overall nitrogen removal efficiency of the reactor is improved. The bioreactor has the following advantages that 1,the impact load resistance is high, and the floor space is small; 2, the influence of aeration on the performance of the reactor is avoided; 3, autonomous deployment of the functional zones is achieved; 4, the overall efficiency of the reactor is improved.