The traction bed is a device used for rehabilitation and physical therapy. This equipment applies traction force to the spine and limbs through mechanical transmission or electric control. It is suitable for the treatment of spinal diseases such as lumbar intervertebral disc protrusion and cervical vertebrae misalignment. The traction bed is divided into three types: spinal traction bed, limb traction bed, and multi-functional traction bed. According to the direction of traction, it can be classified into one-dimensional, two-dimensional, three-dimensional, and four-dimensional types. According to the speed, it can be divided into fast, slow, and variable-speed traction beds. The equipment is equipped with eight traction modes including continuous, intermittent, and repetitive traction, and has an automatic traction force compensation function. It supports independent or synchronous traction of the cervical and lumbar vertebrae.