Cancer bone metastasis needs to be treated in terms of killing cancer cells, protecting bones and relieving pain. 1. Killing cancer cells: Bone metastasis of cancer has already occurred, which means that radical surgery cannot be performed at this time. However, chemotherapy and radiotherapy can be used to kill the cancer cells in the body and inhibit the development of the disease. If the cancer cells have specific gene mutations, targeted drugs can also be used to control the development of the cancer cells in the long term. 2. Protecting bones: Cancer cells that have metastasized to bones will invade bones. Anti-bone metastasis drugs such as desutumumab and ibandronate can be used to protect the bones in order to prevent the destruction of bones caused by the invasion of cancer cells. If the bone quality is severely damaged, bone cement can be used to reinforce the damaged bones in order to prevent pathological fracture. 3. Pain relief: the invasion of bones by cancer cells will cause strong pain. In order to improve the survival quality of patients, pain relief drugs such as celecoxib, aminophenol hydrocodone and morphine can be used to relieve pain. Bone metastases of cancer need to go to professional hospitals and make treatment plan according to their specific conditions under the guidance of doctors.