The utility model provides a cage valve sleeve type throttle valve's maintenance instrument, include: remove frame, span wire and inserted bar, wherein, the high department that predetermines of string one side of locating the removal frame is fixed to the first end of span wire, and the second end of span wire is provided with the height -adjustable festival of connecting piece, connecting piece,during the inserted bar was inserted and is located the connecting piece, the inserted bar was the strong point with the contact point of connecting piece, the first end of inserted bar is arranged in inserting the centre bore of cage valve sleeve type throttle valve's corbula seat, and the second end of inserted bar is for providing the power end, and the first end of inserted bar is less than the second end of inserted bar and the distance of the strong point with the distance of the strong point. The utility model provides a cage valve sleeve type throttle valve's maintenance instrument has solved cage valve sleeve type throttle valve's the problem that maintenance efficiency is low among the prior art.