Abstract: In this paper,we present an optoelectronic butterfly interconnection network for imp- lementing parallel digital calculation.Using this network to MSD algorithm which is famous for para- llel computing,we can perform parallel addition,subtraction,and high-speed multiplication and divi- sion The advantages of using this architecture for optical computing lie in its full exploitation of the parallelism.no-crosstalk of optical interconnection the convenience of electrical interconnection i（?） short distance,and thus the significant increase in speed,compared with its existing counterpart.