Abstract: Objective and MetnodThe objective of this paper was to investigate the technological conditions of SCP producton by Saccharomyces cerevisiae B_(188) to improve the feeding value of bean dregs and to relieve the shortage of forage by use of the bean dregs as raw medium.ResultOptimization of the mediums and the cultivating conditions and the technology was determined.The ratio of bran and bean dregs was 1∶6,the initial pH 5.0,ammonium sulfate and added amount were 3.0; and 0.2; respectively,the inoculation volume were 12;,the cultivate temperature was 30℃and the period for 48 h.In the optimum conditions, the content of SCP synthetic was up to the maximum, protein content was 36.19;.ConclusionThe technology provides a good basis for large scale production of bean dregs feed.