▎ 摘　　要

NOVELTY - Biomass-based glycolic acid detergent comprises 10-40 wt.% glycolic acid, 3-15 wt.% thickening agent, 1-4 wt.% fatty acid polyethylene ether or polyethylene glycol, 0.2-1 wt.% citric acid, 0.2-1 wt.% sodium chloride, 0.2-1wt.% gluconic acid, 0.2-1 wt.% spice, and water (remaining amount). USE - The detergent is useful for degradation of washing wastewater (claimed), and used for descaling, washing vegetables and fruits, and in laundry. ADVANTAGE - The biomass-based glycolic acid detergent has good stability, better degradability, good decontamination effect, high degradation rate and high biocompatibility. The preparation process is simple and convenient, has high production efficiency, and is suitable for popularization and application. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparation method of the biomass-based glycolic acid detergent, comprising weighing each raw material and mixing, then adding an alkaline auxiliary agent or an acidic auxiliary agent, and stirring; and degradation method of washing wastewater, comprising adding metal catalyst to the washing wastewater, degrading under illumination condition, where the active component of the metal catalyst comprises platinum, palladium, rhodium, iridium, gold, copper, nickel, cobalt, ruthenium and/or aluminum, and the washing wastewater is washing wastewater generated after washing with the biomass-based glycolic acid detergent.