Abstract: [Objective and Metnod]The 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.[Result]Optimization 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;.[Conclusion]The technology provides a good basis for large scale production of bean dregs feed.