Abstract: OBJECTIVE To discuss the effective therapeutic regimen of cancer pain patients and the train of thought of pharmaceutical care. METHODS Clinical pharmacist implement the whole pharmaceutical care to a cancer pain patient, and put forward rationalization proposals. RESULTS Clinical pharmacist provided pharmaceutical care to the patient throughout the drug of choice, adverse reactions and reduction for treatment of cancer pain patient, and improved thinking ability with cancer pain teatment. CONCLUSION Participating in cancer pain treatment clinical pharmacist could help to optimize treatment regimen in order to ensure the safety and effectiveness of patients’ medication.