Objective:The aim of the study was to evaluate the efficacy of acupuncture combined with opiates in the treatment of cancer pain through the meta-analysis system.Methods:China national knowledge infrastructure and VIP Database for Chinese technical periodicals,China Biology Medicine,PubMed,Embase databases were searched from January 2016 to February 8,2020 for the randomized controlled trials on the effects of acupuncture combined with opiates on cancer pain.Meta-analysis of ordered data was performed using Stata-MP64 and Review Manager 5.3 software.Results:A total of 242 Chinese studies and 25 English studies were retrieved.According to the inclusion and exclusion criteria,19 literatures finally were included.The fixed effect model was used to combine the total effect values,and the combined odds ratio(OR)(95%confidence interval(CI))was 2.981(2.384,3.729),suggesting that acupuncture combined with opiates was better than opiates alone in treating cancer pain(Z=9.57,P<0.05);the combination treatment could improve Karnofsky Performance Status score(Z=2.48,P=0.01),decrease Numerical Rating Scale score(Z=2.89,P=0.004);it also could reduce eruption pain frequency(Z=4.32,P<0.0001),improve the effects time(Z=2.51,P=0.01),and extend analgesia duration(Z=4.33,P<0.0001);the combination group also had lower Oxycodone dose than the control group(Z=3.193,P=0.001).At the same time,the incidence of adverse reactions was lower than that of the opiate treatment group alone,with a OR(95%CI)of 0.27(0.19,0.37)and statistical significance,Z=8.06,P<0.05.Conclusion:Acupuncture combined with opioids for cancer pain is superior to opioids alone with a lower incidence of adverse reactions.