Organic sewage field returning method

The invention discloses an organic sewage field returning method which comprises the following steps: S1, sampling and testing sewage subjected to anaerobic fermentation, and detecting components and heavy metal indexes in the sewage; s2, instant auxiliary materials are added into the sewage, the auxiliary materials comprise probiotics and potassium fulvate, and the materials are mixed to be uniform; and S3, mixing the microbial inoculum obtained in the step S2 with the sewage obtained in the step S1 according to a volume ratio of 1: (50-80), and directly spraying or irrigating roots into a field. According to the method for returning the organic sewage to the field, the organic sewage is completely recycled through a microorganism method, zero emission is achieved, pollution is controlled through pollution, the use amount of chemical fertilizer is reduced, the treatment cost is low, and the effects of soil improvement and agricultural yield increase are achieved. 本发明公开了一种有机污水还田方法，步骤如下：S1、将厌氧发酵后的污水，进行取样化验，检测污