The application of bio fertilizers to the crops is being propagated throughout the world. The popular and cheap bio fertilizers are vermi compost and Blue green alga. Blue green algae were applied to mainly to paddy fields. Recently they are applied to other crops also. Experiments were conducted to investigate soluble protein of Solanum melangena L. by using vermi compost and BGA in single and double combinations. It was found that Vermi compost in single fertilizer treatment; Vermi compost and BGA in double fertilizer treatment were found to have comparatively high values in soluble protein. The cultivated crops showed maximum value in double fertilizer treatment. Thus the combination of these fertilizers enhances the growth and yield.