The invention discloses a spliced emergency gantry crane. The spliced emergency gantry crane comprises wheel undercarriages (1), supporting frameworks (2), gravity center adjustment block moving components (3), electric driving rotor components (4), hydraulic leg lift components (5), gravity center adjustment blocks (6), undercarriage stabilizing components (7), gantry crane bases (8), a lifting hook transverse moving component (9) and a lifting hook longitudinal moving component (10). According to the spliced emergency gantry crane, moving devices combine the advantages of high speed of wheeled devices and strong obstacle climbing ability of legged devices, can quickly reach appointed regions, and can be spliced into the small-sized emergency gantry crane; lifting hooks can flexibly move on a horizontal plane through the wheeled undercarriages (1), the gravity center adjustment block moving components (3) and the lifting hook transverse moving components (9); and longitudinal movement of the hooks is realized through the lifting hook longitudinal movement component (10).