The invention discloses a rescue method of a hand rocking cross slide rail self-locking rescue device. A hand rocking cross slide rail rescue device is adopted, and in particular, relates to emergentrescue equipment with a cross slide rail at the top end of a hand rocking jack, with an extension rod, for vehicle rescue capable of bearing and quickly supporting; the extension rod is arranged between the cross slide rail and the scissor hand rocking jack; three sets of tooth-shaped projections are arranged in an outer sleeve body of the extension rod; three sets of tooth-shaped projections arearranged in an inner sleeve body; the equipment can realize self rescue through independent operation to greatly save the manpower, the financial resources and the time; vehicle wheels are supported by the equipment through the cross slide rail on the jack; the self rescue is finished through adjusting longitudinal and transverse directions of the cross slide rail; and a vehicle can flatly move longitudinally and transversely through the cross slide rail to achieve the purposes of safe operation, labor saving and convenience to operate, so that the practicability is high.