The invention relates to mechanical part machining, in particular to a split forging method and die for a bucket tooth. The whole bucket tooth is divided into two parts for cutting, cut metal materials are subjected to die assembly and die punching in the die after being heated and are forged and pressed into two bucket tooth blanks, the two blanks are welded together, and finally thermal treatment is carried out. According to the method, the whole bucket tooth is divided into two parts to be forged and pressed, and splitting can be carried out along the longitudinal wide symmetric face of the bucket tooth or the longitudinal wide symmetric face of the bucket tooth or in the direction perpendicular to the long axis. The split forging method and die have the advantages that the whole bucket tooth is divided into the two parts to be formed, a cavity of the die is shallow, the forming face is wide, abrasion to the side line of the die is small in the forging process, the die is easy to maintain, the production period is long, and cost is low. Metal cannot enter a clearance of the die in the forging process, a forged part can be smoothly taken out of the die, and production efficiency is high.