Dizocine injection is an opioid analgesic, its usage and dosage are: intramuscular injection, the recommended adult single dose is 5-20mg, but the initial dose in clinical studies is 10mg, the dose should be adjusted according to the patient’s weight age, pain level, physical condition and taking other drugs, if necessary, every 3-6 hours, the highest dose is 20mg/each time; 1 day up to 120mg/d; administered by sedation. The initial dose is 5mg, and later 2.5-10mg/2-4 hours. Dizocine has a very important role in postoperative analgesia in neurosurgical patients, which can reduce the stress reaction caused by pain, thus can make the patient wake up as soon as possible, and then effectively promote the patient’s recovery.