Erythromycin is a representative antibiotic of the macrolide system produced by Streptomyces erythropolis. The clinical application has been widened in recent years. In addition to the traditional application of anti-partial Gram-negative bacteria, the development of new dosage forms (such as erythromycin enteric-coated pellets) has also greatly increased the amount of erythromycin raw materials. The erythromycin extraction resin provided by Suzhou Bojie Resin Technology Co., Ltd. can selectively adsorb and extract erythromycin, which has fast adsorption speed, high mechanical strength, strong anti-organic pollution, long service life and no erythromycin. Secondary pollution (such as pigment), the best effect of eluting erythromycin with lipid eluent, high elution rate, minimum erythromycin pigment content eluted, regenerated resin can be used repeatedly, high economic benefit .