Intravascular cancerous embolus may disappear if it receives timely treatment, but it will not disappear on its own. Meanwhile, whether the cancerous embolus can be cured in time is also related to the location of the cancerous embolus and its differentiation tendency. Cancer embolism is one of the common complications of tumor, which refers to a series of pathophysiological changes caused by the invasion or accumulation of cancer cells into blood vessels and lymphatic system in the process of growth, propagation and metastasis, or causing blood clotting abnormality, resulting in the dysfunction of blood vessel function and blood operation, abnormal coagulation, thrombosis and a series of pathophysiological changes. At the same time, the location of the cancerous embolus, the type of differentiation and the effect of medication will all affect the chance of cure. If the embolus itself is of high malignant degree or has already caused obstructive necrosis of the surrounding tissues, it is difficult to be cured completely. It is also not completely curable when the embolus is not sensitive to the targeted drugs or chemotherapeutic agents used. This disease can affect the survival period and quality of life of tumor patients. Cancer embolism occurring in important tissues and organs of the human body can seriously endanger the life of tumor patients, and even lead to the death of the patients very soon. After the development of embolism, one should consult the doctor and clinical pharmacist for advice, choose the appropriate drugs for targeted treatment, and have a regular review.