Targeted therapy is a way to treat cancer at the molecular level. If the middle or late stage malignant tumors in the patient’s organism are sensitive to targeted therapy, targeted therapy can be carried out according to the patient’s actual situation. However, it should be noted that early-stage patients, even if they are sensitive, are usually treated with surgery. Before using targeted therapy, patients must go to regular institutions for testing to make clear whether the cancer cells in the organism are sensitive to this kind of targeted drug, if the cancer cells can be effectively killed by the targeted drug, then the patients can choose the targeted therapy, but if the targeted therapy has no therapeutic significance, then the patients need to consider other treatment modes. In addition, it is necessary to choose the targeted drugs that are sensitive to the tumor cells in the patient’s body before carrying out targeted therapy in order to benefit the patient. Targeted drugs will specifically bind to the cancer-causing sites on the tumor cells and cause the tumor cells to die specifically without harming the normal cells around the tumor. Targeted therapy is highly targeted for tumors and has fewer side effects for patients, but the use of targeted therapy must be combined with clinical symptoms and doctor’s advice.