The higher the SUV value of PET-CT, the worse its prognosis, suggesting that the tumor is more malignant. PET-CT is a kind of imaging technology, which can clarify the general scope of the tumor and determine the specific location of the lesion combined with CT. SUV is the abbreviation of standard uptake value of PET-CT, and the size of SUV value is generally taken to identify the nature of the tumor and suggest the malignancy of the tumor. Generally speaking, the larger the SUV value, the worse the prognosis of the tumor and the higher the degree of malignancy. Since the size of SUV value is affected by the activity of tumor cells, therefore, for patients with tumors treated with radiotherapy and chemotherapy, the effect of tumor treatment can be observed according to the SUV value, which can provide an objective basis for clinical personalized treatment. It is recommended that patients cooperate with their doctors to carry out relevant examinations and choose appropriate treatment according to the examination results. If the SUV value of PET-CT is higher, it suggests that the degree of malignancy of the tumor is also higher, if the condition permits, it should be surgically resected in a timely manner, and pathological examination should be carried out after the operation to clarify the nature of the tumor.