The utility model relates to a draw soybean protein's equipment in follow dregs of beans, including alkaline beating tank, gunbarrel and ultrafiltration tank, basicity beating tank's top Middle fixed mounting has the pan feeding mouth, top one side fixed mounting of basicity beating tank has the alkali of notes pipe, outer wall one side fixed mounting of basicity beating tank has the circulating pipe, one side intercommunication of circulating pipe has slurry circulating pump. This draw soybean protein's equipment in follow dregs of beans, the thick liquid goes on fully and the efficient mix in driving alkaline beating tank through slurry circulating pump, dissolve soybean protein with this, and with the leading -in acid -base neutralization that carries on to the neutralizing tank in of the thick liquid of after -separating, and make soybean protein deposit, thereby accomplish the heavy alkali extracting work of simple acid to the thick liquid, crude extract's albumen thick liquid can be carried out the ultrafiltration separation to the ultrafiltration tank in by leading -in this moment, thereby solitaryly draw out with soybean protein liquid, accomplish the work of membrane separation and extraction.