In order to provide leads and ideas for the future clinical researches, overseas current randomized controlled trials on acupuncture for postoperative nausea and vomiting are studied in this article. Summarization is given on those overseas trials of the recent 20 years from aspects of effectiveness and advantages of acupuncture treatment, treatment methods and the best opportunity of treatment. The result indicates that the therapeutic effect of acupuncture on prevention and treatment of postoperative nausea and vomiting is basically approved by modern clinical researches. Further studies should be focused on the potential of influence on acupuncture effect by different types of anesthetics, durations of operation and sorts of surgery. Importance should also be attached on enhancing therapeutic effect of acupuncture treatment by applying proper differentiation of syndromes, as well as its benefit estimation on health economy.