需要。毕业参加OPT可以延长你的签证时间。12个月或29个月不等（architecture, engineering, mathematics, physical sciences, social sciences, biotechnology, medicine and health, education, law, accounting, business specialties, theology, and the arts, and requiring the attainment of a bachelor’s degree or its equivalent as a minimum，这些专业可以EXTEND 到29个月）
然后你可以申请H1B工作签证，可以由3年顺延6年 然后申请IMMIGRATION。