The invention discloses an inflatable balloon catheter. An inflatable balloon comprises a conducting wire arranged inside the catheter in a penetrating mode, an operation portion is fixedly connectedto one end of the catheter, a balloon body is arranged in the outer side of the far end, away from the operation portion, of the catheter, a catheter cavity and a balloon inner cavity are communicatedthrough a communicating structure arranged on the catheter, the conducting wire comprises a first conducting wire and a second conducting wire separated from the first conducting wire, the rear end of the first conducting wire is connected to a pluggable structure at the rear end of the operation portion, and the second conducting wire is fixed to the interior of the catheter through the fixing technology. The conducting wire cavity and a liquid injection cavity can share the same catheter cavity, and the diameter of the catheter is greatly decreased, so that the inflatable balloon catheter can be inserted into a narrow tube or cavity needing to the inflated inside the human body through an endoscopic instrument channel, visualized operation is achieved, and the inflatable balloon catheter has the good practical value.