The utility model discloses a motor magnetic pole T caudal knot constructs relates to electric motor manufacture technical field. The utility model discloses a magnetic pole, be provided with T tail more than three or three on the magnetic pole, every T tail including restriction magnetic pole radial movement's boss with connect the straight -bar of boss with the magnetic pole pole body, the straight -bar width reduces from pole center aline magnetic pole both sides direction in proper order. The utility model discloses can reduce yoke edge side T stern notch and warp, can reduce the yoke edgeside T stern notch flex point greatest stress of department value, reduce this and locate to appear cracked risk.