Fermentation technology to process cow feces into solid organic fertilizer. Cow dung materials, wood sawdust, husk charcoal and effective microorganisms. Processing techniques: to make 100 kg of organic fertilizer: 70 kg cow manure + 20 g wood sawdust + 10 g husk charcoal. The three mixes are stirred evenly, then sprayed with an effective microbe 1 liter dissolved with 50 liters of water, the mixture is stirred until smooth and then covered with tarpaulin, stored for 2 weeks. After 2 weeks the fertilizer is opened, about 3 hours can only be used for plants.