The increasing expansion of water hyacinth plant activity over year has led to the accumulation of large quantity their in the Nile River due to prohibit a lot of rile water and light from organisms living in the Nile, and consuming nile water. Recently, the world used water hyacinth leaves to absorbe the metal ions from waste water. In this study we used this to up- grade nutritional value of some lignocellulosic matertials such as rice straw and banana leaves. The lignocellulosic residues can be used without any chemical or biotechnology pretreatment (control) or can be hydrolyzed before any fermentation, then the subsequent can result in a product with high protein content as well as high digestibility compared to non added residues. In this study, we made mixture combination water hyacinth leaves to rice straw or banana leaves with different ratios (5, 10, 15, 20, 25 and 30 g water hyacinth leaves/100g rice straw or banana leaves). All treatments gave a good results, but treatment added 30 g water hyacinth leaves / 100g rice straw or banana leaves is the better than all. The increasing in protein content from 2.30%, 12.50 % (control) to 10.00%, 17.10 % and decreasing in fiber fraction sepically, cellulose and lignin. Cellulose decreased from 33.30 %, 26.30% to 22.00%, 19.35% and lignin decreased from 11.60%,8.50% and 5.95%, 5.35% in rice straw and banana leaves, respectively. In vitro digestibility studies indicated significantly (P< 0.05) higher values for treatment added 30% water hyacinth leaves in the rice straw and banana leaves , respectively, to produce feed non traditional for animals. Pleurotus ostreatus was used to upgrade nutritional value of rice straw, banana leaves and water hyacinth leaves by using different amounts of Pleurotus ostreatus inoculum, in solid state fermentation technique. The chemical composition and in vitro digestibility of the resulted protein enriched product were deter­mined. Cellulose, hemicellulose and lignin showed gradual decrease with increasing inoculums of Pleurotus ostreatus , however, in vitro disappearance increased