The invention discloses a comprehensive treatment method for glyphosate wastewater. Pollutant factors are removed from phosphoric wastewater and aluminiferous wastewater, generated from different technical processes for IDA-route glyphosate synthesis of a preparation process which takes diethanolamine as a starting raw material and contains a dehydrogenation catalyst, through interaction. According to the method disclosed by the invention, through adjusting and optimizing technical control key points such as material proportion, pH and reaction temperature, carrying out dephosphorizing by using sodium metaaluminate wastewater instead of a dephosphorizing agent so as to produce aluminum phosphate precipitates and removing the aluminum phosphate precipitates, not only can a better phosphorus and aluminum removing effect be achieved, but also the aim of treating the waste with the waste is achieved. The method has the advantages of environment-friendliness, economizing and the like.