Abstract: The experiment is done with the method of microbial anaecrobic fermentation,using bean dregs as the main raw materials.The change ofthe crude protein in bean dregs was measured before and after the fermentation with Kieldahl Method.The content of crude protein in the fermented bean dregs hasincreased from 19.67% to 28.06%,which was 1.42 times of the originals.The results of the experiment showed that the technology of microbial anaerobic fermentation can effectively degrade the protein of bean dregs and increase the protent content of bean dregs.Therefore,this method can be used for the making of animalfeed since it is more economic and environmentally protective.

Key words: bean dregs, anaerobic fermentation technology, crude protein