Auxiliary frame assembly, cabin framework assembly and vehicle

The invention provides an auxiliary frame assembly, a cabin framework assembly and a vehicle, the auxiliary frame assembly comprises an auxiliary frame body and two collision beams, the two collision beams are connected to the two ends, in the width direction of the vehicle, of the auxiliary frame body respectively, the collision beams extend along a straight line, and the two ends, in the extending direction, of the collision beams are a connecting end and a collision end respectively; the connecting end is connected with the auxiliary frame body, the collision end is used for bearing force, and the distance between the two collision beams is gradually increased in the direction away from a cab of the vehicle. According to the auxiliary frame assembly provided by the embodiment of the invention, the collision beam can decompose a part of collision force into force in the width direction of the vehicle at the moment of collision, the vehicle is pushed to transversely move in the width direction in time and qu