Rapid and high-precision alignment device and alignment method for multiple sections of H-shaped steel beams

The invention discloses a rapid and high-precision alignment device and alignment method for multiple sections of H-shaped steel beams, belongs to the technical field of rapid installation of beam cranes, and can solve the problems that the alignment precision is limited and time and labor are wasted when the multiple sections of H-shaped steel beams are assembled in the prior art. The alignment device comprises a height measuring mechanism, a fine leveling mechanism and a connecting mechanism; the height measuring mechanism is used for respectively measuring the heights of at least three measuring points on the upper surfaces of the lower flanges of two adjacent sections of butted H-shaped steel beams with the same specification; the lower surface of the lower flange of each H-shaped steel beam is placed at the top end of the fine leveling mechanism so that the fine leveling mechanism can adjust the height of the H-shaped steel beam; and the connecting mechanism is arranged at the butt joint seam of the two