TOMO radiotherapy technology is a radiotherapy method that precisely irradiates the rays on the tumor under the guidance of CT. TOMO radiotherapy is also a type of radiotherapy, which is only a combination of linear gas pedal and CT machine. Under the guidance of CT image, 360-degree focused tomography irradiation is selected to act on tumor tissues, which is not only capable of calculating and verifying the radiation dosage, but also capable of determining the treatment site more accurately, reducing the side effects of radiotherapy, and enhancing the treatment efficiency. TOMO radiotherapy can be completed in about 8 minutes and is mostly used in the treatment of nasopharyngeal carcinoma, etc. During the period, adverse reactions such as acute mucous membrane reaction and radiation pneumonitis may occur, but most of them can be recovered after treatment.