The Professional Growth Community(PGC)of this research included Chinese teachers at Teacher Education University and elementary school as well as elementary preservice teachers. Based on the concept and the process of lesson study, they collaboratively prepared lessons, observed and debriefed on Chinese content-exploring-teaching. The purpose of the study was to explore how the PGC constructed and practiced the process of collaborative lesson preparation, observation and debriefing, which is based on the concept of lesson study. It also discussed the impact on Chinese content-exploring-teaching competence of elementary preservice teachers and community members. The research findings can be summarized as follows: First, the lesson study process of PGC can effectively bridge theory and practice. Second, the lesson study process of PGC met the learning needs of elementary preservice teachers, activated the learning intelligence, and echoed the assumption of lesson study: Helping teachers to understand how students think and learn new things. Third, collaborative lesson preparation, observation and debriefing of lesson study concept was conducted through professional dialogue, co-design, observation and discussion of teaching. It enabled Chinese teachers at Teacher Education University and elementary school to acquire information and knowledge to deepen Chinese content-exploring-teaching. Subsequently, they reflected on teaching to strengthen their professional competence. Fourth, based on the concept of lesson study, the PGC deepened preservice teachers’ understanding and construction of Chinese content-exploring-teaching knowledge, and enhanced their professional competence of Chinese content-exploring-teaching design and performance. Based on the findings of the research, the researcher puts forward relevant suggestions as a reference for elementary preservice teacher education and research.