Abstract:Objective To explore the effect of thoracic paravertebral block (TPVB) and pectoral nerve block (PECS block) on patients underwent breast surgery. Methods Public databases were searched including PubMed, Web of Science, EMBase, Ovid, Cochrane, CNKI, VIP and wanfang Data and CMB, in order to collect randomized controlled trial (RCT) of the effects of TPVB and PECS block on breast surgery. RevMan 5.2 software was used to carry out the Meta-analysis. Results There were six RCTs consisting of 323 patients underwent breast surgery in group PECS block (n?=?161) and group TPVB (n?=?162). Mata-analysis showed that the postoperative analgesic consumption of group PECS block was lower than that of group TPVB [MD?=?1.35, 95% CI (-2.24, -0.46)]. The pain scores of group TPVB was higher than that of the group PECS block [MD?=?1.35, 95% CI (-2.11, -0.59)]. There was no significant difference in the incidence of postoperative nausea and vomiting between the two groups [RlR?=?0.93, 95% CI (0.56, 1.32)]. Conclusions According to existing evidence, PECS block analgesia is superior to TPVB block analgesia in breast surgery patients.