The main means of treatment for primary lung cancer is radiation therapy. Conventional radiation therapy requires 30-35 times, five times a week, and a total course of 6-7 weeks. With the development of radiation therapy technology, especially the progress of computer technology in recent years, the precision of radiation therapy equipment has reached a higher level, which can increase the dose of each irradiation while protecting the surrounding normal tissues. Therefore, the number of irradiation sessions can be reduced to a large extent, and all cancer cells can be removed in about 5-10 sessions, and the total treatment course can be shortened to 1-2 weeks, which saves patients’ cost and time.