Abstract: Since the 19th National Congress of the Communist Party of China, the strategic deployment of deepening the comprehensive and complementary reform of the judicial system and fully implementing the judicial responsibility system has been addressed; therefore, the juvenile courts face many new challenges, among which are the institutional adjustment, functional differentiation, etc. appeared with the gradual development of internal institutional reform. As a result, how to maintain the professional development direction and adhere to the characteristic severity of juvenile trial is an important challenge in the new era. Drawing on the existing problems, the top-level design, and taking the judicial practice of juvenile court in the B area as an example, this paper puts forward the "harmony in diversity" development model to strengthen the juvenile court construction. With respect to promoting the coordinated development and jointly improving juvenile and family trials, the structure of juvenile and family trial should be planned scientifically, the scope of accepting cases need to be clarified, and moreover, the juvenile and family trial's business scope, personnel allocation, and trial management standards should also be relatively independent from each other.