If there is only a single metastatic lesion of kidney cancer, patients can generally survive for 5 years or even longer after active treatment; if there is systemic metastasis, the survival period is not as good as the former, but the specific situation depends on the condition and cannot be generalized. 1. Single metastatic lesion: if there is only a single metastatic lesion and it is detected in time and treated actively, the survival period will be greatly prolonged; for example, the average survival period of kidney cancer patients who have single bone metastatic lesion removed by surgery is 5 years. 2. Multiple metastases: for example, kidney cancer may metastasize to organs such as bones, liver and spleen. The prognosis of patients with brain metastasis and liver metastasis is relatively poor. Brain metastasis of kidney cancer suggests that the tumor has entered into advanced stage, and the natural survival period may only be about 4 months, and the active treatment can extend more than 1 year; if the metastatic foci are sensitive to the treatment of targeted drugs, the metastatic foci will be significantly reduced, which will improve the quality of life of patients and prolong their life span. The specific survival time of patients with metastatic kidney cancer depends on their specific condition and cannot be generalized. It is suggested that patients should go to regular hospitals for consultation and treatment in time. In daily life, kidney cancer patients should pay attention to low-salt diet, consume light and easy-to-digest food, and limit protein food intake, which can reduce the burden of kidneys to a certain extent, prolong the survival time and improve the quality of life.