The utility model relates to a special tool for assembling a tube bundle and a cylinder. A heat exchanger tube bundle and cylinder assembly tool for a sleeve lime kiln comprises a section of H-shaped steel, wherein a round steel plate is welded at one end of the H-shaped steel; a group of steel bars are welded on the round steel plate; the group of steel bars pass through and are welded with another round steel plate parallel to the round steel plate; openings in the two sides are closed by the steel plates at the other end of the H-shaped steel, and a frange plate on the H-shaped steel is provided with an oblique rod; a lifting lug is arranged at the end part of the oblique rod. The special tool provided by the utility model can easily finish overall assembly of the heat exchanger tube bundle and cylinder, the refractory on the inner wall of the cylinder is prevented from being scratched, the operation is quicker, and the production quality of the heat exchanger is guaranteed.