Abstract: The ride comfort of a 4×4 off-road vehicle was analyzed according to the ride evaluation quality and method both under random road and impulse inputs. Firstly, the existing evaluation methods were reviewed. According to the quality requirement of the actual off-road vehicles, the analysis procedure, simulation method and integrated evaluation criterions were developed. Then, a multi-rigid-body dynamic vehicle model was established with software Adams. Finally, the ride comfort simulation and integrated evaluation were carried out, getting the evaluation indicators including the "Cross-country average velocity" under random road with different level, and the "Limited velocity" allowing to pass the obstacle with different heights. The simulation results show that the ride comfort quality of this vehicle can achieve the design requirements.