At present, the main equipment of radiation therapy for treating malignant tumors is linear gas pedal, which mainly generates high-energy X-rays to act on malignant tumors and kill them. High-energy X-rays are photon rays, in addition, linear gas pedal also generates electron rays to treat more superficial tumors. At present, the deep X-ray machine is in the state of elimination. The more advanced equipment also includes proton therapy machine and heavy ion therapy machine, which have very good physical advantages. Different irradiation rays are selected mainly according to the tumor condition, depth, scope, and the irradiation dose tolerated by the invasion of the surrounding normal endangered organs. Nowadays, the most conventional application is linear gas pedal, and post-mounted radiation therapy machine, in addition particle implantation is also belong to radiation internal irradiation. For nasopharyngeal cancer radiation therapy, CT simulation followed by linear gas pedal therapy is often used to optimize the dose distribution and maximize the protection of normal tissues, which may include crystals, optic nerve, pituitary gland, parotid gland, etc. For hormonal tumors, for example, proton irradiation equipment may be more suitable. There are also pediatric tumors, considering the sequelae caused by radiation in the future and the possibility of secondary carcinogenesis, so pediatric tumors have more applications in proton devices.