Reverse taper hole machining cutter and cutter handle thereof

The invention relates to the technical field of taper hole machining cutters and discloses a reverse taper hole machining cutter and a cutter handle thereof. The cutter handle comprises a cutter handle head portion, a cutter handle middle portion and a cutter handle tail portion; the front end of the cutter handle head portion is provided with an opening; the front end of the cutter handle middleportion is inserted into the cutter handle head portion and rotationally connected with the cutter handle head portion; the rear end of the cutter handle middle portion is inserted into the cutter handle tail portion and is in sliding connection with the cutter handle tail portion in the axial direction; the cutter handle middle portion is internally provided with an inclined hole and a cavity from front to rear in sequence; the axis of the cutter handle middle portion penetrates through the center of at least one cross section of the inclined hole; a driven shaft is connected in the inclinedhole in a sliding manner,