This paper takes teachers leaving their jobs in private schools as the research object. Based on relevant research literature，a questionnaire is developed. Meanwhile，combining SPASS20 software，reliability，validity and descriptive statistical analysis are carried out on the reasons for teachers’ leaving their jobs in private schools in Henan Province，and then the important factors that lead to teachers’ turnover in private schools are obtained：the society has certain prejudice against teachers in private schools，the salary and treatment in private schools is unfair，and teachers in private schools lack a sense of security. Based on the analysis of the influencing factors of dimission，this paper puts forward some optimization suggestions to reduce the dimission rate of teachers in private schools：correcting social prejudice，attaching importance to the construction of teachers’ team in private schools，and improving teachers’ job satisfaction.