The invention discloses a treatment method for dioscorea zingiberensis wastewater. A primary sedimentation tank removes sulfate radicals in the wastewater by using quicklime, and a primary anaerobic reactor further removes middle sulfate radicals in the wastewater, so that the inhibition and toxic effects of the sulfate radicals on anaerobic microorganisms are reduced; the wastewater enters a secondary anaerobic reactor for anaerobic treatment and then is subjected to denitrification through a secondary A/O reactor; finally, suspended matter and total phosphorus are removed through a gas floating tank. The treatment method for the dioscorea zingiberensis wastewater can be used for treating the wastewater generated by extracting saponin from dioscorea zingiberensis, and the wastewater reaches the emission standard.