The purpose of this study is to investigate the receptive vocabulary size of Korean university students in Chinese. The study was conducted at the end of the 2022 fall semester and focused on the receptive aspect of vocabulary knowledge, specifically on ‘reading.’ The participants were divided into three groups: 1st year, 2nd year, and 3rd-4th year students, and a vocabulary assessment was carried out. The assessment vocabulary consisted of 80 items extracted from the HSK (2015) test. As a result, the accuracy rates were 60.07% for the 1st year, 76.98% for the 2nd year, and 80.77% for the 3rd-4th year. After conducting one-way ANOVA and post hoc tests, there were statistically significant differences in scores between the 1st year group and both the 2nd year and 3rd-4th year groups. However, there was no statistically significant difference between the 2nd year and 3rd-4th year groups. When comparing the accuracy rates to the cumulative vocabulary of 5,000 words in the HSK level 6, it showed that the 1st year group knew approximately 3,103.50 words, the 2nd year group knew 3,849.00 words, and the 3rd-4th year group knew 4,038.5 words.