Cancer phobia is classified as a psychological disorder that also manifests itself in behavior, a disorder that produces fearful thoughts and behaviors towards cancer. Cancer phobia is caused by insecurity, fear of one’s own cancer, or anxiety, irritability and depression due to the fear of death brought by cancer, and these negative factors will reduce one’s resistance to disease, which is not conducive to the treatment of cancer. Patients with cancer should maintain an optimistic attitude towards life, have confidence in overcoming the disease, and dare to face the reality. A positive and progressive mindset helps the body to recover. Patients with cancer phobia should correct their bad state of mind in time to avoid further development of the disease, and should formulate individualized treatment plans under the guidance of physicians and follow standardized treatment.