The invention discloses a citrus degreening method. The method includes steps of storage degreening treatment, middle-stage degreening treatment and later-stage degreening treatment. By control of temperature, humidity, time, ethylene concentration, ethylene flow rate, circulating air flow rate and the like in each step, the problem of ethylene concentration difference in different steps of a citrus degreening process is solved, and pedicel and fruit decaying caused by improper ethylene concentration is avoided; in addition, uniformity of citrus surface temperature, humidity, ethylene concentration and the like can be kept by appropriate internal air circulation to realize uniformity in citrus degreening and freshness of fruit color. The citrus degreening method has advantages of large-scale treatment, low cost and good taste of citrus.