The invention discloses a draw gear assembly and a rail vehicle with the draw gear assembly. The draw gear assembly comprises a draw gear mounting seat and a draw gear fixedly arranged on the draw gear mounting seat, and further comprises guide components arranged on two sides of the draw gear mounting seat, wherein the guide components are provided with longitudinally tilting guide sliding chutes; the front ends of the guide sliding chutes are higher than the rear ends; and sliding blocks which are in sliding fit with the guide sliding chutes in the corresponding sides are fixedly arranged on two sides of the draw gear mounting seat, and are configured as follows: under an initial state, the draw gear mounting seat is fixedly connected with the guide components, and the sliding blocks are located at the front ends of the guide sliding chutes. The structural design of the draw gear assembly can guarantee a coupling function of the draw gear during normal operation; and when collision occurs, the draw gear can neither invade the upper parts of the guide components to damage upper equipment nor fall onto a rail to increase derailing risk in the backing off and energy absorption processes, so that the passive safety of rail vehicle collision can be improved.