Wastewater of soying industry has complicated constituents,and usually contains many kinds of organic things. It has deep tinct, and it is difficult to decompose, and a large fluctuation exists in water character and flow. The paper essentially introduces how to apply the treatment technology of two stair anaerobic_SBR process to treat the soy wastewater. At first, the anaerobic tank must be filled with the spring solid packing, also as a SBR reactor pond are followed. By analyzing the feature of the design,the characteristics of the engineer and the treatment efficiency, the final results show that the average investment of one ton wastewater is 2.9 thousand yuan,and the average treatment fee of one ton is about 0.4 yuan. The most importance is the steady treatment result and the final effluent quality can meet the national standard.