The invention discloses a super-
thick plate splicing method. The method comprises the following steps that S1, an X-shaped notch is formed in super-thick plates, and butt-joint of the super-thick plates is completed; S2, the
splice joint height is adjusted, and a first distance is made to meet requirements; S3,
welding on the upper side surface of a
splice joint is completed; S4, the super-thick plates are overturned; S5, the
splice joint height is adjusted, and a second distance is made to meet requirements; and S6,
welding on the super-thick plates is completed. According to the super-thickplate splicing method, by propping up the splice joint, the thicknesses of the super-thick plates are adjusted, different reverse deformation heights are arranged for different super-thick plates, andpre-set reverse deformation is adsorbed by heat shrinkage produced after
welding. Meanwhile, pressing blocks are used for pressing the super-thick plates after the super-thick plates are overturned,and post
welding deformation is further controlled. According to the super-
thick plate splicing method, on the premise that the welding quality of the super-thick plates is guaranteed, the purpose that welding can be completed after the super-thick plates are overturned for one time is achieved, the splicing time is saved, and the splicing cost for the super-thick plates is lowered.