先天性髋关节脱位是小儿骨科常见疾病。在复位之前的牵引过程中 ,由于牵引重量大、时间长和小儿不能很好配合等原因 ,往往不能维持有效牵引体位 ,影响牵引效果。传统的抬高床尾 15～ 30ｃｍ[1] 的方法不能解决因水平位超重牵引而致患儿下移的问题。笔者在临床工作中应用自制四 Congenital dislocation of the hip is a common disease of pediatric orthopedics. In the traction before the reset process, due to traction weight, a long time and children can not cooperate well and other reasons, often can not maintain effective traction position, affecting the traction effect. The traditional method of elevating the height of the bed 15-30 cm [1] can not solve the problem that the child moves down due to the excessive horizontal traction. I use homemade in clinical work four