The major purpose of this study is to explore the pre-service teacher in teaching practicum courses of preservice mentoring process. This study investigated a mentoring program to fifteen Chinese course pre-service training teachers at National Sun Yat-Sen University. It was based on scaffolding, reflective practice, and peer coaching that included series of the mentoring, modeling, practicing, reflecting and discussing activities. We analyzed whether the scaffolding strategies of this program in different stages was helpful to increase pre-service teachers¡¦ reflective and critical abilities of teaching. The program included of many activities in the¡urealization and clarification¡v,¡ucatching and reconstruction¡v and ¡upractice and reflection¡vstages, such as realizing and clarifying personal principles of teaching, experienced and intern teachers¡¦ interviews, the experienced teachers¡¦ teaching demonstration, developing the lesson plans, micro-teaching and teaching practices . Moreover, the issues about courses were also discussed on the internet. Document analysis and surveys were used to investigate the mentoring process, including pre-service teachers¡¦ works, discussion, and studying surveys. This study showed that all pre-service teachers affirmed that the mentoring program was helpful for them to realize, clarify, and even to reconstruct their principles of teaching. Besides, they also realized the current situations in the school. The findings also revealed that the pre-service teachers reconstructed their thinking of teaching, perceived the questions of teaching and changed their behavior of teaching by discussion, feedback, and resources sharing. Although the pre-service teachers perceived this program as helpful, this program was lack of scope and profundity in combining the theory and practice of teaching. This study suggested that more strategies promoted the pre-service teachers¡¦ reflective practice, such as estimating the pre-service teachers¡¦ teaching scheme, organizing a group of mentors and effective scaffolding. The study concluded with some recommendations for the teaching practicum courses of teacher¡¦s education and teaching practical training system.