To meet the increasing societal demands for the quality of childcare education in preschools and the requirements of the new Preschool Education Program, it is essential that the preschool teaching staff undergo comprehensive improvements in both ethical qualities and professional standards. Using theoretical research methods, reading and analyzing legal documents, examining management and autonomy documents, as well as employing synthesis, statistical, and comparative methods, this article focuses on several key areas: an overview of professional development and preschool teacher training; an analysis of the current state of teacher quality, ethics, and professional development of preschool teachers in Thai Binh; and recommendations for renewing the management of professional development activities to improve the quality of education, take care and upbringing of children in preschools in Thai Binh province in the current period.