There are many problems in the employment and internship management process of college graduates in my country,such as:too centralized management,difficulty in choosing internships for students,poor communication between schools and enterprises,information asymmetry,and low credibility.The article designs a graduate internship management system model based on blockchain technology.This system can promote the school,employer and students to break information barriers,achieve transparent sharing of information,establish a trustworthy mechanism,encourage legal behavior,and provide various benefits for all parties.Stakeholders provide a reliable interaction platform with important application prospects.