The invention discloses a memory alloy C ring and an implanting and taking-out device thereof. The C ring is composed of a beam, two clasping claws and two oblique shoulders. The implanting and taking-out device comprises a lead screw, a frame, a sliding block, a screw rod, a left hook, a right hook and a knob. The memory alloy C ring is convenient to implant due to the small size and will not injure ribs due to the gentle strength; the distance between the two hooks of the implanting and taking-out device of the C ring can be adjusted, C rings of different specifications can be quickly and conveniently arranged on a funnel chest orthopedic plate and the ribs in a clasping mode, the C rings recover to a preset C shape at the body temperature after being implanted in the body, and thus fixation of the orthopedic plate and the ribs is achieved without additional suture fixation; when it is needed to take out the product, the C rings do not need to be cooled, and the C rings of differentspecifications can be easily and quickly taken out through a small incision and operation space by means of the implanting and taking-out device, so that it is easy and fast to implant and take out the orthopedic plate, and the operation time is greatly shortened.