Balancing tool and balancing method for drum type inner cavity cantilever high-rotation-speed rotor

The invention discloses a drum type inner cavity cantilever high-rotation-speed rotor balancing tool and balancing method, and belongs to the field of aero-engine assembly. The drum type inner cavity cantilever high-rotation-speed rotor balancing tool comprises a transmission shaft assembly, a stator casing supporting assembly, an adapter ring and a bearing seat assembly; the stator casing supporting assembly is connected and positioned with the bearing seat assembly; an adapter ring is assembled at the front mounting edge of the stator casing supporting assembly, and a front spigot of the adapter ring is used for being connected with a stator casing for positioning; the transmission shaft assembly is used for axially positioning and clamping and radially positioning and clamping a rear mounting edge spigot on the fan disc; the problem of rotor balance of a drum type inner cavity cantilever high-rotation-speed compressor of a certain type of aero-engine is solved. The invention provides a balancing tool and a