The utility model discloses a steering frame, including framework and truck bloster, the framework is including two curb girders being parallel to each other and the crossbeam be connected with the curb girder middle part, and the recessed formation in middle part of curb girder is used for installing the lower concave part of truck bloster, is equipped with primary suspension between the both ends of curb girder and the axle box, is equipped with a plurality of air spring between the below of truck bloster and the crossbeam, and the top of truck bloster is equipped with a plurality of wheel motor with car connection. The utility model discloses a steering frame has increased the one -level and has hung on the basis that original two -stage hung between truck bloster below and crossbeam, realize functional isolation, and the tertiary system of truck bloster top hangs and only is used for undertakeing the lateral displacement function, and the secondary suspension of truck bloster below only is used for undertakeing rotation function, can increase vehicle displacement volume and rotation angle between automobile body and the steering frame when the negotiating curve, improves the vehicle curve handling capacity. The effect of making an uproar can be played good vibration isolation, fall in the combination that the third grade hung, and the vibration of rail is taken turns to the effective attenuation, improves the riding comfort ability.