The invention relates to the technical field of vehicles, and provides an all-terrain automatic control method and device for a vehicle. The all-terrain automatic control method for the vehicle comprises the steps that an all-terrain automatic control request is received, and vehicle running state parameters are acquired based on the all-terrain automatic control request; the type of the road where the vehicle runs is confirmed based on the acquired vehicle running state parameters; and the vehicle is controlled to execute terrain modes matched with the confirmed type of the road, and the terrain modes comprise the urban road mode, the snow mode, the mud mode, the sand mode and the 4L mode. Thus, manual judgment to the running environment is not needed, the intelligent degree of the vehicle is improved, self-adaptive selection and control can be carried out according to the terrain modes matched with the road type, and the running performance and experience of the vehicle are improved.