The utility model discloses a bush assembly of an automobile suspension, which comprises a bush inner tube, a rubber body, limiting holes, a limiting buffer plate and a bush outer tube which are vulcanized integrally. The rubber body is positioned between the bush inner tube and the bush outer tube, the limiting holes of the rubber body are positioned on two sides of the bush inner tube, a main rubber spring is arranged on a portion of the rubber body between the limiting holes, and the integrally vulcanized arc-shaped elastic limiting buffer plate in a buffer structure is arranged inside a portion of the rubber body between one limiting hole and the bush outer tube. The bush assembly is in the nonlinear variable-rigidity rubber bush structure, vibration caused by exciting force is reduced, vibrational displacement caused by large vibrating force is limited, impact and vibration can be cushioned well, ideal static rigidity curves can be obtained by a limiting mechanism to evenly apply large impact force to the rubber for absorption, large displacement is avoided, noise caused by impact can also be avoided effectively, the stress concentration area can be eliminated, and the service life of a suspension system is prolonged. The bush assembly of the automobile suspension is applicable to a suspension system for an automobile power assembly, and capable of serving as an engine suspension bush assembly.