A disclosed method for recovering erythromycin from erythromycin-containing wastewater comprises the following steps: (1) performing purification, concretely, getting erythromycin-containing wastewater, applying to macroporous resin chromatography column, washing, and then using an eluant for eluting, so as to obtain an eluate; (2) performing crystallization pretreatment; and (3) fetching the solution obtained in the step (2), and crystallizing to obtain erythromycin thiocyanate. The method is capable of effectively purifying effective erythromycin in nanofiltration dialysis water or an erythromycin thiocyanate first-crystallization mother liquor, and removing impurities, thereby overcoming the problems that a conventional method directly discharges the two kinds of wastewater and leads to waste and environment burden and the like. The method is good in industrial application prospect.