The invention discloses a large deformation protector for anti-seismic control damper. The large deformation protector comprises a protecting shell with an open end and a closed end. A connection is connected to the outside of the closed end of the protecting shell. A sliding guide rod is inserted in the open end of the protecting shell and does reciprocating motion in the same. One end of the sliding guide rod is inserted in the protecting shell, and the other end of the sliding guide rod is exposed out of the protecting shell. The end, inserted in the open end of the protecting shell, of the sliding guide rod is fixedly connected with a slide block doing the reciprocating motion in the protecting shell. The middle inner wall of the protecting shell is provided with slide block positioning ribs used for limiting the slide block. An Austenitic shape memory alloy wire is arranged between the slide block and the protecting shell and applied with prestress Sigma p. One end of the Austenitic shape memory alloy wire is connected with the slide block, and the other end of the Austenitic shape memory alloy wire is connected with the closed end of the protecting end. The large deformation protector is unique in construction, novel and reasonable in design, effective in protecting the anti-seismic control damper from failure, reliable in performance and bright in application prospect.