Patients accepted laparoscopic radical operation for carcinoma of colon and upper middle section of the rectum will be as the research object. Cancer patients are diagnosed based on pathology or cell biology. The trial is randomized, parallel and open. They are randomized into 2 groups: both groups receive surgery. The experimental group receives conventional treatment combine with electroacupuncture Zusanli point .etc finish operation and the contrast receives the same conventional treatment with experimental group. Clinical evaluation includes gastrointestinal tract recovery of function, pain relief, life quality improvement. Blood biochemistry tests mainly include gastrin(GAS), stress related hormone, peroxidatic reaction and the ratio of immune cells.

Inclusion Criteria:

• Weight: 40kg-90kg, male and female.
• Diagnosis: imaging, cell and pathology report.
• Brain, heart, lung, liver, kidney are at good condition in 2 weeks before surgery.
• No conscious obstacle and limbs disability.

Exclusion Criteria:

• Fainting during acupuncture.
• Electrolyte imbalance.
• Serious and life-threatening complications after surgery.
• In addition, patients taking part in other clinical trials, being treated with other biotherapy or immunotherapy and researchers consider not suitable for clinical subjects for other reasons will be excluded.