Cultivation education of preservice teachers’ professional ethics is an important strategy for normal university to foster their virtue and professional ethics literacy. Positive psychology proposed that virtues and character strengths are vital for well-being, healthy, and meaningful life of humans. Normal universities should carry out character strengths education to help preservice teachers to identify and use their character strengths. Normal universities should also guide preservice teachers to learn how to encourage others effectively, and enjoy doing it, promoting the development of preservice teachers’ professional ethics.