Objective: To develop a rehabilitation training device applicable to upper limb and lower limb muscle atrophy in postoperative patients, early postoperative rehabilitation intervention, reasonable rehabilitation training, and exercise to reduce muscle atrophy, and to help improve the ability of postoperative patients to move independently. Methods: The upper limb rehabilitation training device is comprised of a bed body and a sliding mechanism, with the sliding mechanism having a fixed component, a telescopic component, a snap-on component, and a power component. The sliding mechanism on the bed body moves back and forth, and the corresponding exercise can be performed in any position on the bed body. The lower limb rehabilitation training device comprises a base plate, a fixing box, and a seat, with the fixing box's structure comprising a fixation frame, a moving box, a pedal, a pressing block, an activity block, and other devices. The upper limb training device can ensure the safety of patients and accompanying personnel, while exercising multiple parts of the patient's muscle groups, and increasing the device's applicability; the lower limb training device can be positioned in time; and the height of the pedal can be adjusted to solve the problem of the training device's rebound force accidentally shocking the lower limbs and the inconvenience of the pedal height, which afflict patients. Conclusion: The use of rehabilitation training device training, leads to early recovery of postoperative patients' independent activities, improvement of patients' postoperative self-care ability, promotion of patients' postoperative rehabilitation, enhancement of patients' quality of life, and a decrease in postoperative complications.