Objective To systematically review the prevalence of lacunar infarction in Parkinson disease patients. Methods The research on lacunar infarction and Parkinson disease was electronically retrieved in PubMed， Web of Science， The Cochrane Library， Embase， CNKI， WanFang Data， VIP， and China Biomedical Database. The search period was from the establishment of the database to September 2024. After independently screening literature， extracting data， and evaluating the risk of bias for inclusion in the study by two researchers， Stata 17.0 was used to conduct a Meta-analysis of the prevalence of lacunar infarction in Parkinson disease patients. Results A total of 12 articles were included， involving 1 335 Parkinson disease patients. Meta-analysis showed that the overall prevalence of lacunar infarction in Parkinson disease patients was 26.2% ［95%CI （17.9%， 34.6%）］. Subgroup analysis showed that the prevalence of lacunar infarction diagnosed by 3.0T MRI （28.1%） was higher than that diagnosed by 1.5T MRI （20.9%）. The prevalence of lacunar infarction diagnosed according to the International Parkinson and Movement Disorder Society criteria （33.4%） was higher than the UK Brain Banks criteria （20.8%）. The prevalence of lacunar infarction in Parkinson disease in China （32.6%） was higher than that in Japan and South Korea （13.3%）. The prevalence of lacunar infarction in Parkinson disease patients from 2021 to 2023 （28.3%） was higher than that from 2015 to 2020 （24.2%）. The prevalence of lacunar infarction in Parkinson disease patients in cohort studies （47.2%） was higher than that in cross-sectional studies （31.6%） and case-control studies （11.6%）. Conclusions The prevalence of lacunar infarction is relatively high in Parkinson disease patients， so the diagnosis and treatment of cerebral small vessel disease in Parkinson disease patients should be taken seriously.