The invention relates to a method for carrying out comprehensive treatment on household waste, excrement and urine of people, livestocks and domestic fowls and water treatment sludge to produce an organic fertilizer, which comprises the following steps: separating out organics which can be used for producing the fertilizer in household waste by a method of arranging and sorting separately; after carrying out fine processing on the organics, mixing the organics with the excrement of people, livestocks and domestic fowls; collecting all waste of an abattoir and the water treatment sludge to carry out mixing and stirring; feeding the mixture into a large-scale underground storage tank to generate masses of biogas; carrying out fertilizer standardization treatment on the decaying fertilizer by a detecting test station; and transferring the obtained safe and nuisanceless multi-element quick-acting organic fertilizer to vegetable bases and farms by a pump through pipelines (the pipe network) or selling the obtained organic fertilizer.