After graduating from teacher preparation institutions, beginning teachers often get stuck in their school job, and experience reality shock. Through several adjustments and changes in their teaching processes, beginning teachers gradually explore and establish their own pedagogical content knowledge (PCK). With two beginning junior high school teachers as the subjects, the purpose of this research is to explore how they develop their PCK in the area of civic education. Adopting a qualitative approach, the data sources in this study included classroom observation, interviews and documents. It is hoped that the findings and suggestions of this study will be of interest to other teachers and researchers, and also provide valuable information for teacher education institutions.