The invention discloses a lifting tool for a nuclear waste storage and transportation barrel. The lifting tool comprises a connecting piece, a first base, a second base, a driving mechanism, a base adjusting mechanism and a lifting claw mechanism. The connecting piece is arranged above the first base, the driving mechanism is connected with the connecting piece, the driving lifting claw structureof the driving mechanism is used for grabbing and releasing, the second base is arranged below the first base through the base adjusting mechanism, and the base adjusting mechanism adjusts the heightof the second base in the vertical direction. The first base and the second base of the lifting tool for the nuclear waste storage and transportation barrel jointly constitute a main bearing body of the lifting tool for the nuclear waste storage and transportation barrel, the bearing capacity of the lifting tool for the nuclear waste storage and transportation barrel is improved, the height of thesecond base in the perpendicular direction is adjusted through the base adjusting mechanism, containers to be hoisted at different heights can be hoisted, the adaptability of the lifting tool is improved, the lifting tool is suitable for grabbing and releasing operation situations of various containers to be hoisted at different heights, and the use range of the lifting tool is enlarged.