The utility model provides a leveling device of a concrete tower drum. The leveling device comprises a laser swinger erected in a tower drum body and matched with the tower drum body, a receiver arranged along the peripheral edge of a lower opening of the tower drum body and matched with the laser swinger, and a jack installed below the tower drum body. Wherein the tower drum body comprises a lefthalf tower drum module and a right half tower drum module, three receivers are uniformly arranged on the inner wall of each tower drum module at intervals, and the receivers are supported by embeddedparts fixed on the tower drum body; the jacks are in one-to-one correspondence with the receivers and comprise a horizontal adjusting direction and a vertical adjusting direction. According to the technical scheme, the device is simple and reasonable in structure, convenient to operate and high in precision, and personal errors are eliminated. And meanwhile, after the levelness of the tower drumis adjusted, the diameter of the tower drum can be adjusted, and finally, the whole operation time is only 2 hours at most, so that the leveling quality and progress of the tower drum are greatly improved.