The effects of different organic materials on the physical and chemical properties，organic carbon and humic matter of meadow soil were analyzed，so as to prevent the degradation of meadow soil fertility and the improvement of meadow soil productivity. There were four treatments:single chemical fertilizer(CK)，biochar and chemical fertilizer(BF)，straw and chemical fertilizer(SF)，organic fertilizer and chemical fertilizer(OF)，the same amount of fertilizer was added in each treatment，and same carbon amount was applied in BF，SF and OF treatment. The results showed that: (1)The addition of three organic materials increased the soil available potassium，available nitrogen and soil pH，in which the addition of soil available potassium and available nitrogen increased by 17.53% and 30.54%，respectively，and the soil pH under straw increased by 16.96%；the biochar addition also increased the soil available phosphorus by 27.39%.(2)The content of all components of soil humus increased under the addition of biochar and organic fertilizer，and the content of fulvic acid and hummintin increased under the addition of straw，while humic acid decreased. In short，organic fertilizer had more advantages in improving soil humic acid，reaching 37.37%，and biochar increased soil hummintin more，reaching 148.12%.(3)The addition of three kinds of organic materials increased the content of soil organic carbon and active organic carbon components. Organic material had a significant impact on organic carbon，physical and chemical properties and humus of meadow soil，and was closely related to carbon source type. Biochar had more advantages for improving soil quick nutrients. Biochar and organic fertilizer had a strong ability to improve humus，while straw reduced humic acid. Three kinds of organic materials were conducive to the accumulation of soil organic carbon and active organic carbon components.