Language immersion has been an emerging educational method for K-12 students to acquire foreign languages. Despite its effectiveness, there are a limited amount of teacher education programs designed specifically for language immersion educators. Thus, many language immersion teachers have been applying knowledge learned from general teacher educational programs, which are not designed for language immersion settings, into their daily teaching. Simultaneously, the language immersion programs, especially Chinese immersion programs, have identified multiple educational challenges related to curriculum design and content teaching, classroom management, and cross-cultural communications. This study aims to address these challenges from the perceptions of selected Chinese immersion teachers towards their teacher preparation programs via qualitative in-depth case studies. Results show that the educational philosophy and psychology theories and practices, curriculum and instruction, cross-cultural competence, and practicum in existing preparation programs contribute positively towards immersion teaching in the U.S. However, Chinese immersion teachers demand more social-emotional learning and diversity, equity, and inclusion preparation. Potential solutions to these challenges require synergistic efforts from the current teacher preparation programs, Chinese immersion programs, and policymakers.