The invention discloses a dressing change auxiliary device for orthopedics, and relates to the technical field of medical auxiliary instruments. The dressing change auxiliary device for orthopedics aims at solving the problem that an existing fixing mechanism is attached to a limb, and a bandage is inconvenient to untie or wind on the limb again. The dressing change auxiliary device for orthopedics specifically comprises a base, a pedal type hydraulic cylinder is fixedly installed at the top end of the base, a damping rotating shaft is fixedly installed at the top end of a piston rod of the pedal type hydraulic cylinder, a supporting plate is fixedly installed at the top end of the damping rotating shaft, and a universal spherical hinge is fixedly installed at the top end of the supportingplate. According to the dressing change auxiliary device for orthopedics, nursing personnel can adjust the position of the device according to the injured part of a patient, the height of a sickbed and the like, the limb to which medicine is applied is placed on a sponge pad of a transverse plate when the device is used, the limb is fixed through a flexible side plate and a hook-and-loop fastenerbelt, and the limb is prevented from swinging due to pain during medicine application; due to arrangement of a notch, the medical personnel can conveniently bind up a wound; and meanwhile, the limb is lifted, the sickbed and the like are prevented from being polluted during dressing change, and the labor amount of the medical personnel is reduced.