The vehicle-mounted mobile substation consists of incoming HV switchgear system, main transformer, outgoing LV switchgear system and semitrailer etc. The cushion is provided between the equipment on vehicle and inside LV switchgear compartment and the trailer, so as to improve the transport reliability. Soft feeder is used for connection between equipment in order to avoid the damage of equipment resulting from deformation of compartment during travel. The period needed from arrangement to operation after the mobile substation reaches site is less than 180 minutes
