Organic fertilizer prepared from cow dung and straw and preparation method thereof

The invention discloses an organic fertilizer prepared from cow dung and straws and a preparation method thereof. The preparation method comprises the following steps: firstly, uniformly mixing cow dung, fruit and vegetable straws and high-carbon auxiliary materials; stacking a mixture obtained in the previous step layer by layer to form a piled body, and spraying a decomposition agent and fillingthe piled body with a decomposition fertilizer in the process of stacking; and introducing hot air into the piled body, covering the surface of the piled body with a thin film, turning over the piledbody for the first time after a period of time, adding a nitrogen fixing agent in the process, covering the piled body with the thin film for continuous composting, uncovering the thin film after a period of time, and performing free composting to obtain the organic fertilizer. By adopting the method disclosed by the invention, harmless treatment of vegetable waste can be realized, the vegetablewaste can be recycled as a