Background: Epidural anesthesia for pain relief during and after surgery has been widely applied in the world for decades. The results of many studies show that this method reduces intra - and postoperative complications and reduces the postoperative mortality rate of major surgery. The study aimed to evaluate epidural anesthesia’s effectiveness and side effects in colorectal cancer surgery. Methods: A cross - sectional descriptive study on 28 patients receiving epidural anesthesia in surgery for colorectal cancer in combination with endotracheal anesthesia. The patient’s vital signs and health status were monitored before and after the injection of pain medication. Record the level of pain relief according to the Visual Analog Scale (VAS), the degree of motor paralysis according to Bromage, and the side effects after surgery. Results: Good postoperative pain relief effect, at all times after surgery, VAS was ≤ 1.5. Rate of complications: hypotension: 7.14%, headache: 7.14%, shiver: 10.71%, nausea, vomiting: 17.86%. Conclusion: The epidural anesthesia combined with general anesthesia is an effective and safe analgesia technique for abdominal surgery during surgery and 24 hours after surgery.