Sugarcane bagasses are rich in cellulose and lignin content whose degradation is the main problem for industries utilizing them for various purposes. The present investigation is based on application of fungi in degradation of lignin and cellulose from sugarcane bagasse. Degradation was estimated after 3 weeks of solid state fermentation of sugarcane bagasse by Aspergillus niger. Fermentation process was divided into two parts i.e., culture media fortified with different concentrations of nutrient supplements and not fortified with any kind of supplements. The result reveals that maximum loss of cellulose was 14.2% (without fortification) and of lignin was 26.2% (with 5% glucose fortification). The initial cellulose and lignin content was reported to be 58.5 and 18.4 respectively.