Large continuous casting ladle turret slewing bearing replacing support and replacing method

The invention discloses a large continuous casting ladle turret slewing bearing replacing support and a replacing method. The large continuous casting ladle turret slewing bearing replacing support comprises a rectangular supporting frame body and a jacking mechanism. The supporting frame body comprises four bottom plates, four supporting stand columns, horizontal supports, an inclined support and a base plate. The bottom plates are arranged above a concrete foundation, the supporting stand columns are fixedly arranged above the bottom plates, the horizontal supports are transversely arranged at the upper end and the lower end between the supporting stand columns below two fork arms of a rotary arm, and the inclined support is arranged in the middle of the supporting stand columns; and steel plates with the same section size are welded to the top ends of the supporting stand columns, and the jacking mechanism and a plurality of base plates are longitudinally arranged above the steel plate and used for underla