Abstract: The change of organic nitrogen forms and contents have direct relation with worth of agriculture compost during the chicken manure composing. The paper dealt with the variational orderliness of them in order to provide theory according as producing organic fertilizer with high quality. Composting tests with chicken manure and corn stem as raw composting materials were conducted under inner room condition. Organic nitrogen forms were determined at different composting stages. The results indicated that the change of TN reduced at the primary period, then increased during the composting of chicken manure and reduced 30.4% at the end of composting, and increased all the time in the treatment corn stem and chicken added with corn stem, increased 4 and 2.4 times respectively; THN/TN was the same as the change of TN in the treatment chicken manure and increased 7.9% at last, reduced in the treatment corn stem and chicken added with corn stem and declined 40.56% and 23.15% respectively; AN/THN increased at first then decreased in the treatment chicken manure and decreased 13.49%, and increased gradually in the treatment corn stem and chicken added with corn stem, and increased 9.7 and 2.1times; AAN/THN reached the lowest content in the treatment chicken manure, corn stem and chicken added with corn stem in the 21st and increased 1.5,5.1 and 4 times; ASN/THN decreased 32.5% in the treatment chicken manure, increased 5.4% and 2.9% respectively in the treatment corn stem and chicken added with corn stem; HUN/THN reached the highest content in the three treatment in the 21st and increased 30.9% in the treatment chicken manure, decreased 46.2% and 23.9% in the treatment corn stem and chicken added with corn stem. So this kind of conclusion can be drawn that the content of TN heightened and increased the number of AN/THN、AAN/THN、 ASN/THN, decreased the number of HUN/THN, therefore availability of organic nitrogen advanced during the composting chicken added with corn stem.