Aquaculture sewage treatment method and aquaculture sewage comprehensive treatment system

The invention relates to an aquaculture sewage comprehensive treatment system and also relates to a method for treating aquaculture sewage by the device. The aquaculture sewage comprehensive treatment system comprises a sewage collection tank, a bioreactor, an aeration adjusting tank and a coagulation sedimentation tank which are sequentially communicated, wherein a grille is arranged in the sewage collection tank, and a water inlet is formed in the upper end of the bioreactor and is communicated with the water outlet of the sewage collection tank; a stirrer is arranged in each of the coagulation sedimentation tank and the aeration adjusting tank; a spindle is horizontally arranged in the bioreactor, multiple supporting rods are fixedly arranged on the spindle and are vertical to the spindle, spiral blades are fixedly arranged at the free ends of the supporting rods, the outer surfaces of the blades are rough and uneven, and a microorganism degradation inoculant coats the blades. The aquaculture sewage compre