The invention relates to a special hoisting sling and a hoisting method for a nuclear power station CR10 and reinforcing steel bar composite module. The special hoisting sling comprises a transition beam, main slings, sling distributors, outside auxiliary slings, inside auxiliary slings and adjustable pull rods. According to the special hoisting sling and the hoisting method for the nuclear power station CR10 and reinforcing steel bar composite module provided by the invention, the special hoisting sling is adopted as connection between a hoist and the CR10 and reinforcing steel bar composite module, the special hoisting sling is connected before hoisting, the transition beam is connected with the hoist, and the adjustable pull rods are connected with inside and outside lifting lugs on the CR10 and reinforcing steel bar composite module. A center-of-gravity position of the CR10 and reinforcing steel bar composite module is adjusted through applying balance weight and adjusting the adjustable pull rods, so that the level degree of a lower port is ensured. The CR10 and reinforcing steel bar composite module is in position through hook-lifting, rotating, walking and hook-dropping of normal hoisting. According to the special hoisting sling and the hoisting method provided by the invention, the deformation of the CR10 and reinforcing steel bar composite module during a hoisting process can be effectively reduced, the level degree of the lower port of the CR10 and reinforcing steel bar composite module is ensured, and the construction safety is ensured.