Objective To find the dangerous depth of Fengfu and Yamen acupuncture points using MRI and dead bodies sectional anatomy The acupuncture safety depth Calculated can provide clinicians with the acupuncture security reference standard. Methods 1. Select healthy adult male volunteers， to screen 30 subjects； 2. Acupoints positioning and marking of body dimensions， the needle point should be affixed with medical tape of cod liver oil； 3. To get straight-line distance from the image of the surface of cod liver oil to the danger point on MRI section； 4. Sift 10 cases of moderate size male body. Mark the body surface points with marker maker， cut with high-speed band saw after being frozen， and then to measure the straight line distance from surface of acupuncture points to the danger point anatomical structure on the cross section with a vernier caliper； 5. Analyze statistically the data by using T test. Results Piercing the dangerous depths and the safe depths of Fengfu and Yamen acupoints to compare MRI group with the body group， and the results show： P<0.05， with a difference. Conclusion The average maximum safe depth value recommended for medium size male as following： Fengfu 36mm， Yamen 36mm.