Heavy ion therapy has a certain role in the treatment of tumors and is one of the treatment modalities of radiation therapy for malignant tumors. Heavy ion therapy has the following characteristics: 1) the damage to the tissues around the affected area is relatively small compared to other radiotherapy methods; 2) the treatment time is relatively short; 3) the cure rate is relatively high, and early sensitive tumors can even be cured. It is mainly used for the treatment of lung cancer and liver cancer, and the time required is relatively short, but it is more effective for the treatment of early sensitive tumors. However, there will be certain adverse reactions, but they are not particularly strong and can be relieved by symptomatic treatment. Therefore, once suffering from liver or lung diseases, it is better to go to the relevant departments of the hospital for examination and treatment in a timely manner, and then to carry out targeted treatment.