The invention discloses an integral die-forging method for frogs. The integral die-forging method comprises the steps of cogging, pre-forging and finish-forging, wherein during the cogging, original blanks heated to reach an initial forging temperature are pre-allocated in the axial direction through cross wedge rolling to obtain blanks; during the pre-forging, the blanks heated to reach the initial forging temperature are prefabricated through die-forging to obtain prefabricated blanks; and during the finish-forging, the prefabricated blanks heated to reach the initial forging temperature areforged through the die-forging to obtain the frogs. According to the method disclosed by the invention, formation is realized in the manner of cross wedge rolling cogging, die-forging pre-forging anddie-forging finish-forging, and after the cross wedge rolling cogging and the die-forging pre-forging, the form of the mass distribution of the prefabricated blanks is gradually converted to the formsimilar to the finish-forged pieces, of a plurality of the prefabricated blanks at the two ends and a few of the prefabricated blanks at the middle in the axial direction, and a plurality of the prefabricated blanks at the two sides and a few of the prefabricated blanks at the middle in the section direction, from the uniform-section form of the original round-rod-shaped blanks; the tendency of slip of the blanks due to instability during the pre-forging is reduced through the matching of the columnar characteristic of the blanks and the guide characteristic of the pre-forged die cavities; and the integral die-forging method is high in axial machining accuracy and material utilization rate, stable in process, and capable of realizing integral die-forging for the frogs under a low tonnage.