OBJECTIVE：To conduct reevaluation of systematic review/Meta-ana lysis on the efficacy and safety of selegiline in the treatment of Parkinson ’s disease （PD）. METHODS ：Retrieved from PubMed ，Embase，Cochrane L ibrary，CNKI，Wanfang database as well as official websites of domestic and foreign health technology assessment institutions ，based on manual retrieval and review of references ，systematic review/Meta-analysis on selegiline alone or combined with other anti-PD drugs （trial group ） versus placebo or blank control or other anti-PD drugs （control group ）were collected. The time limit was from database inception to November 2020. After literature screening and data extraction ，PRISMA statement was adopted to evaluate the quality of the included reports. AMSTAR 2 scale was used to evaluate the methodological quality ，and GRADE method was adopted to evaluate the evidence quality ，the outcome indicators of the included studies were summarised and analyzed. RESULTS ：A total of 12 systematic reviews/Meta-analysis were included ，involving 4 systematic reviews and 8 Meta-analysis；there were 31 outcome indexes in total. PRISMA scores of them ranged from 16.5 to 27.0，including 15.0 to 21.0 for 2 literatures（16.67％）and 22.0 to 27.0 for 10 literatures（83.33％）. Results of AMSTAR 2 scale showed that the methodological qualities of 2 literatures were classed as high quality ，3 as low quality and 7 as very low quality. Results of GRADE evidence quality evaluation showed that 1 evidence quality was high-level ，3 were medium-level ，5 were low-level ，21 were very low-level ，and 1 was no evaluable . The main factors leading to the degradation were bias risk （87.10％），publication bias （77.42％），inaccuracy （51.61％）and incon sistency（41.94％）. In terms of therapeutic efficacy ，compared with control group ，selegiline could improve the total score of UPDRS ，UPDRS Ⅰ score，UPDRS Ⅱ score，UPDRS Ⅲ score and Webster score in patients with Parkinson ’s disease，either monotherapy or in combination with other anti-PD drugs （P＜0.05）. In terms of safety ，there was no significant difference in the incidence of adverse events or mortality between 2 groups（P＞0.05），but the rate of withdrawal due to adverse events was higher（P＜0.05）. CONCLUSIONS ：Selegiline is effective and safe in the treatment of Parkinson ’s disease ，but current methodological quality and evidence quality of included systematic reviews /Meta-analysis are low，which requires further standardization of research methods.