Preferential policies can provide financial support, tax relief and other preferential conditions for college students' entrepreneurship, and reduce the cost and risk of entrepreneurship. Understanding preferential policies will help college students make better use of policy advantages and promote the growth and development of entrepreneurial projects. At the same time, preferential policies can also stimulate college students' entrepreneurial enthusiasm and encourage more people to participate in entrepreneurial innovation. Therefore, understanding preferential policies is very important for college students to start their own businesses.