The utility model relates to an alkaline residue waste liquid processing mechanism, include: sour sedimentation unit, oil phase recovery unit and electric capacity deionization unit, sour sedimentation unit includes: alkaline residue storage pool, sulphuric acid storage pool, automatic control valve, line mixer and acidizing settling cask, line mixer is connected with sulphuric acid storage pool and alkaline residue storage pool, automatic control valve sets up between sulphuric acid storage pool and line mixer, line mixer is connected with the acidizing settling cask, the oil phase is retrieved the unit and is included: oil phase storage jar, oil phase delivery pump and the refined equipment of oil phase, the first exit linkage of oil phase storage jar and acidizing settling cask, oil phase storage jar is connected with the oil phase delivery pump, the delivery port and the refined equipment of oil phase of oil phase delivery pump are connected, electric capacity deionization unit includes: in adjust jar in, with water and water delivery pump and the first ion device that goes in succession. This alkaline residue waste liquid processing mechanism simple structure is stable, and treatment flowsheet is convenient, low cost, and waste water treatment is effectual to the alkaline residue.