Being difficult for single-discipline talents to meet the social needs, interdisciplinary compound talents training mode has gradually become the main reform direction among colleges and universities. This paper discusses the importance of establishing a feasible and effective talent quality assurance system for the training of compound talents. Through the comparison and analysis of schemes and measures put forward by colleges and universities with advanced teaching reform experience, taking civil engineering-law compound talents training mode as an example, this paper explores feasible ways to improve talent quality in this training mode, and complete the research on talent quality assurance system in compound talent training mode.