||Over the last few years, use of cereals in the poultry and livestock feed increased greatly. To meet the requirement of the feed industry, the production and proper utilization of the grains is much more important. Some grains due to presence of some anti nutritional factors limit their use in desired quantity. Similarly, their low amino acid profile and fewer digestibilities also hindered the utilization of these nutrient sources. Sorghum cereal is one of them which provide a considerable amount of protein and energy to the animal. Some other grains, sorghum contain a phenolic compound "Tannin" which is an anti nutritional component for both poultry and livestock. Tannin make a complex with protein, starch and some minerals thus reduce there availability for living beings. The present project has been planned with their objective to reduce tannin contents and increase digestibility of nutrients. The purpose of the study is the nutritional evaluation and up gradation of indigenous feed stuffs for Livestock and Poultry, so we can increase the use of sorghum grain in these industries. For this purpose two varieties of sorghum, red and white were used. Red and white sorghum varieties were treated with sodium hydroxide and formaldehyde of 0.05%, 0.1% and 0.2% solution and were kept at ambient temperature for 8, and 16 hrs. At the end of treatment, samples of each variety were tested for tannin contents and proximate analysis. In the last phase of experiment, all the treated samples of NaOH, formaldehyde and distilled water were monitored for in situ digestibility for 12, 18, 24, and 30 hrs. The data thus obtained were statistically analyzed by using completely randomized design through ANOVA Technique. The difference among treatment means were tested through Duncan's Multiple Range Test. The results of the present experiments showed that the treatment of high tannin sorghum grain with alkali or simple distilled water is the most effective method for reducing the total tannil contents in sorghum grain. It is further noticed that the alkali treatments also affect the overall nutritive value of grain and enhance the dry matter digestibility of the grain.