Objective To systematically review the incidence of peripherally inserted central catheter（PICC）-related thrombosis in Chinese adult cancer patients. Methods PubMed,Embase,the Cochrane Library,Web of Science,CBM,CNKI,WanFang Data and VIP databases were electronically searched to collect studies on the incidence of PICC-related thrombosis in Chinese adult cancer patients from inception to May,2021. 2 reviewers independently screened the literature,extracted the data and assessed the risk of bias of included studies,and then the meta-analysis was performed by Stata 14.0 software. Results A total of 23 pieces of the literature involving 15 066 cancer patients were included. Meta-analysis results showed that the total incidence of PICC-related thrombosis in Chinese adult cancer patients was 8.82%[95%CI（5.93%~12.18%）]. Subgroup analysis showed that the incidence of PICC-related thrombosis was higher in the publication year from 2019 to 2021. The incidence was also higher in patients with age≥ 60 years old,BMI>25,cephalic vein puncture,traditional puncture method,the number of punctures more than 1,catheter size of 5 Fr,lung cancer,cancer stage of Ⅲ~Ⅳ,diabetes mellitus,history of PICC catheterization,history of venous thrombosis,fibrinogen content≥4 g/L before catheterization and D-dimer level≥0.5 mg/L before catheterization. Conclusions The incidence of PICC-related thrombosis in Chinese adult cancer patients is high,so health workers should pay more attention to early screening and prevention of high-risk patients.