The invention relates to an elastic fixing device for a frog heel end part in a railroad, a fixing device and a fixing method thereof. The elastic fixing device comprises alternate iron, a high-strength bolt, a wing rail, a long point rail, a short point rail and a frog heel tongue rail, wherein the rail bodies of the wing rail, the long point rail, the short point rail and the frog heel tongue rail are provided with holes; and the alternate iron is arranged between the wing rail and the long point rail, between the long point rail and the short point rail and between the short point rail andthe frog heel tongue rail respectively and is in precise connection by elastic pins and the high-strength bolts. The elastic fixing device for the frog heel end part has the advantages that through the elastic pin and the welded alternate iron which is manufactured, the elastic fixing device effectively homogenizes the vertical temperature force between regions, ensures the fixing of the positionof each part of the frog heel end, limits the excessive flex of the long point rail and the short point rail, ensures the stability of the geometric shape and position of a turnout and ensures the high flatness and smoothness of the turnout.