The improvement of teacher leadership is the key to promote the quality of kindergarten education. As a kind of teacher leadership, authentic leadership is related to the teacher's personality traits. This paper collects data on the authentic leadership and personality of 157 teachers in three private kindergartens in Kunming, Yunnan Province of China, and validates the research hypothesis that teacher personality can affect teachers' authentic leadership through SPSS analysis. Based on the descriptive analysis and linear regression analysis, it can be seen that the authentic leadership of private kindergarten teachers in Yunnan Province needs to be further improved, and personality as an inseparable part of predicting leadership needs to be re-emphasized. Results also indicate that when testing personality traits, future researchers must use complete questionnaires instead of short questionnaires.