Abstract: ［Abstract］Objective　To evaluate the clinical value of ultrasound in evaluating the wrist nerve stem．Methods　The examination of the high-resolution ultrasound about normal median nerve，ulnar nerve，radial nerve in the wrist on 100 normal volunteers，the courser，shape and sonographic appearance of the nerve stem were observed，and the vertical and horizontal diameter and the area of cross-section were measured．Results（1）Ultrasound clearly showed the nerve stem arranged and organization structures around it.（2）Ultrasound entirely measured the vertical and horizontal sections of normal median nerve，ulnar nerve，radial nerve in the wrist，besides it measured various diameters and the cross-section area. By comparing the vertical diameter of MN and RN between left hand and right hand of the same sexuality，the difference had no statistical significance（P＞0.05）.By comparing the various diameters of UN between left hand and right hand of females，the difference had no statistical significance（P＞0.05）．By comparing the vertical diameter between left hand and right hand of male ，the difference had statistical significance（P＜0.05）.To compare the vertical diameter of MN， RN and UN between male and females on the same side，the difference had statistical significance （P＜0.05）.To compare the CSA of MN， RN and UN between left hand and right hand of the same sexiuality， the diffevence had no statistical significance（P＞0.05）；By comparing the CSA of MN，RN and UN between male and females on the same side，the diffevence had statistical significance（P＜0.05）.Median nerve cross-sectional area （CSA） and weight correlation was statistically significant （P < 0.05） in a straight line， no statistically significant correlation was found between age and height （P > 0.05）. （3）High resolution ultrasound clearly showed the neural surrounding adjacent to the organizational structure，and in line with gross anatomy section. Conclusion　Ultraound has a clinical evalution value for examing the wrist nerve