The invention discloses a fertilizer reutilization technology for vegetable tail vegetables by a composting method. The method comprises the steps as follows: after harvesting vegetables in spring, shoveling a piece of idle land about 4-5 m<2> in summer, spreading a plastic film of the same size on the ground, piling up and compacting vegetable tail vegetables with soil at a ratio of 3:1.5, spraying a biological bacterial fertilizer dilution solution 3 to 4 times when building a pile until waste is piled up, covering the pile with soil uniformly, and then sealing the pile with the plastic filmfor closed fermentation; after 10 to 15 days of high-temperature stuffiness, turning over the pile once mechanically or manually, then sealing the pile with the plastic film for the closed fermentation again for 10 to 15 days, drying in the sun and raking finely to obtain a very good organic fertilizer. By adopting the technology provided by the invention, the major problems such as shortage of organic fertilizers, decline of land productivity, lack of guarantee on quality, safety of agricultural products and the like in agricultural production can effectively solved, the agricultural ecological environment can be improved, the quality of the agricultural products can be enhanced, the market competitiveness of the agricultural products can be increased, and the income of farmers can be increased.