Neck lumbar traction bed is through the computer control motor and hydraulic transmission device, implementation of traditional Chinese medicine traction, Angle rotation and manual reduction action of a device, etc. Saving time and effort can well meet the needs of the treatment on lumbar disease. Based on the failure phenomenon of traction bed hydraulic transmission device, the composition and working principle analysis of the hydraulic system, concluded that failure of the hydraulic transmission device is due to the pressure gauge damaged or blocked between the tubing and the overflow valve, which allows users to quickly troubleshoot.%颈腰椎牵引床是通过计算机控制电机和液压传动装置，实现中医牵引、角度转动及手法复位等动作的治疗设备。该设备省时省力，能较好地满足治疗腰椎疾病的需要。根据牵引床液压传动装置出现的故障现象，分析液压系统的组成及其工作原理，判断造成液压传动装置的故障是由于压力表损坏或出油管与溢流阀之间的堵塞而引起，从而快捷地排除故障。
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