目的确定儿童尺神经不稳定的多发性及其与年龄和韧带松弛之间的关系。方法将１５０名受检儿童分成３组，分别为０～５岁、～１０岁、～１５岁。检查尺神经在肘部的位置改变及是否有Ｗｙｎｎｅ－Ｄａｖｉｅｓ韧带松弛征象。将数据进行统计学分析。结果３组分别有１９％、８％和６％发生尺神经完全移位，而且除１例外均为双侧。韧带松弛的儿童中２７２７％尺神经完全移位，７０．９１％半移位，１．８２％无移位。结论儿童尺神经容易发生移位并与年龄和韧带松弛有关。 Objective To determine the child-ulnar nerve instability and its relationship with age and ligamentous relaxation. Methods 150 children were divided into three groups, 0 ~ 5 years old, ~ 10 years old, ~ 15 years old. Check ulnar nerve position changes in the elbow and whether there Wynne-Davies ligament laxity signs. The data were statistically analyzed. RESULTS: Completely displaced ulnar nerve occurred in 19%, 8% and 6% of the three groups, and bilateral except 1. 2727% of the ulnar nerve completely displaced, 70.91% of the semi-translocations, and 1.82% of the children with ligamentous laxity did not shift. Conclusion The ulnar nerve in children is prone to shift and is related to age and ligamentous relaxation.