The invention relates to an engineering machinery tire with an optimally designed tire bead, in particular to an engineering machinery tire which can be assembled in a large type earth mover and a shovel loader. The tire comprises the tire bead, wherein the tire bead comprises two or more groups of steel wire loops; cross section areas as well as inner diameters of the groups of steel wire loops of the tire bead are different. The tire has the advantages that each group of steel wire loops are designed more reasonably, thereby achieving the optimal design of the tire bead and making the best use of the tire.