Abstract: In order to improve the land use efficiency and the economic benefit per unit area, a mixed sowing and cultivation technology of fodder oat and sweet clover is developed. By applying this technology, the space, light, heat and water can be prudently and effectively utilized, the yield and quality of the forage can be improved, and the nutritional complementarity can also be achieved. Sweet clover is proved to be able to improve the soil structure and fertility. The comprehensive study regarding the mixed sowing and cultivation technology of fodder oat and sweet clover determines the key technical indicators such as land selection, seed preparation, sowing, field management and harvesting, which provides technical support for the normalization, standardization, industrialization and marketization of field production.