Morphine is a kind of opioid chemical, firstly isolated from poppy base extract by a German chemist in 1806, named morphine, which is the Chinese translation of English. Its derivative morphine hydrochloride is a common clinical anesthetic with a very strong analgesic effect, mostly used for severe pain caused by trauma, surgery and burns, but also for angina pectoris caused by myocardial infarction, which can play an analgesic role. The diacetate of morphine is also known as heroin. What is the medical value of morphine, a drug whose biggest disadvantage is that it tends to form dependence? Morphine is the most powerful analgesic used worldwide, usually in the form of a solution, but it can also be made into tablets for oral use, and there is even a patch that can now be attached to the body for analgesia in the late stages of cancer. Its medical effects: first is the analgesic effect, powerful analgesic effect on all pain are effective; then is the sedative effect, analgesic and at the same time produce sedative effect produced, and can produce euphoria, improve the patient’s nervousness. Cough suppressing effect, inhibit the cough center to produce cough suppressing effect. Excitation of smooth muscle, the tension of smooth muscle increases, which can make peripheral blood vessels dilate. It has a very strong role in the World Health Organization’s recommended tertiary analgesic regimen for cancer, and is a major analgesic drug.