City rail vehicle articulates bogie connecting device, end underframe device no. 1 is articulated through vertical round pin and bogie connector, and end underframe device no. 2 is articulated with the bogie connector through horizontal pin. End underframe device is by both ends welding boundary beam about the lower apron, the assembly of left end welding crossbeam, and welding main beam and stiffening beam between the assembly of right -hand member welding end beam, crossbeam assembly and end beam assembly weld the needle beam between main beam and the boundary beam, and the welding has a gusset between end beam assembly and the boundary beam, and the welding of end beam assembly right -hand member has riser and an upper cover plate, and the steel bushing welding is lapped to weld under with at the upper cover plate and is in the same place. The beneficial effects of the utility model are that but articulated formula train has bogie make full use of gross rail load on axle small in quantity, shortens connection distance between the vehicle, improves advantages such as whenever prolonging the load of meter gauge way, reinforcing train wholeness, the security of improvement train, has fine application prospect.