The invention provides a wagon bogie framework and a longitudinal beam thereof in order to omit a transverse stopping base and realize direct connection with a transverse stopping piece. The longitudinal beam comprises an upper cover plate, a lower cover plate and a web connected between the upper cover plate and the lower cover plate. The web is arranged on the inner side of the upper cover plate and the inner side of the lower cover plate. The middle of the web is provided with a wing plate arranged in an upward protruding mode, and the wing plate and the other parts of the web can form a base plate used for connecting the transverse stopping piece. The wing plate is combined with the other parts of the web plate to form the base plate, so that the transverse stopping piece can be directly connected to the web and the transverse stopping base does not need to be welded onto the web, therefore, the transverse space is saved and the longitudinal beam can adapt to frameworks with smaller transverse space; due to the fact that the transverse stopping base does not need to be welded onto the web, too many weld seams generated by welding are omitted, welding deformation of the longitudinal beam is reduced, fatigue reliability reduction, caused by weld seam concentration, of the longitudinal beam is avoided and the assembling precision of a bogie is effectively improved.