Vehicle body posture semi-active leveling control method and system and engineering vehicle

The invention discloses a vehicle body posture semi-active leveling control method and system and an engineering vehicle, and belongs to the technical field of engineering machine.The manual control method comprises the steps that the vehicle state is adjusted to meet the selected posture adjustment requirement, and the vehicle body posture is adjusted according to preset vehicle body displacement information in the current posture adjustment mode; the active control method comprises the steps that when a vehicle is located on a horizontal road, the vehicle body posture is adjusted according to preset vehicle body displacement information in a neutral position returning mode, when the vehicle is located on a slope, the current vehicle state is adjusted to meet the leveling requirement, an adaptive vehicle body displacement action is executed according to the road environment where the vehicle is located to level the vehicle body, and meanwhile, the vehicle body posture is adjusted. And judging whether the veh