The invention discloses a continuous casting tundish strip-type gas curtain retaining wall which comprises a strip-type gas curtain retaining wall body (1), a gas chamber (2), a fixed sleeve (3) and a gas feeding pipe (5), wherein the gas chamber (2) is formed in the strip-type gas curtain retaining wall body (1); one end of the gas chamber is a blind end, and the other end of the gas chamber is provided with the fixed sleeve (3) in a sleeving manner; the fixed sleeve (3) is used for connecting and fixing the gas feeding pipe (5); one end of the gas feeding pipe is fixed in the fixed sleeve (3), and a thread end (6) is arranged at the other end of the gas feeding pipe and is connected with a metal pipe of a gas source; the outer end of the fixed sleeve (3) is sealed through corundum plaster; and the continuous casting tundish strip-type gas curtain retaining wall is characterized in that three grooves are uniformly formed in the outer wall of the fixed sleeve (3). The problems of easy looseness of the fixed sleeve and gas leakage due to the looseness are solved; furthermore, the gas curtain retaining wall body (1) is a diffuse type corundum ventilating wall and is resistant to corrosion and scouring; and the service life is substantially prolonged and can reach 20 to 24 hours.