Background: To compare the analgesic efficacy of acupuncture versus patient controlled analgesia (PCA) in the treatment of low back pain for post spine surgery. Method: We reviewed the medical records of the hospitalized patients with diagnosis of low back pain for post spine surgery in neurosurgery ward of Chang Gung Memorial Hospital, Linkou Branch, from March 2013 to July 2013. The clinical profiles included general characteristics and pain assessment was made using NRS (numeric rating scale). Result: The patients pain score for PCA group increased from 3.13 to 3.67 (P>0.05) at postoperatively during the second day compared to the first day. The pain score for the acupuncture group decreased from 3.83 to 3.29 (P<0.05), 3.15 (P<0.05) and 2.71 (P<0.05) at postoperatively during the second day, third day, and forth day , respectivively. But the difference between the two groups was not significant. Conclusion: The effectiveness of acupuncture for pain after spinal surgery is not inferior to PCA. Owing to its safety and simplicity, it is worth of further application and dissemination.