The invention discloses a parking braking control method and device. The method comprises the steps that a hooking train set is determined, wherein the hooking train set comprises a to-be-rescued train and a rescue train; a parking braking instruction is acquired, wherein the parking braking instruction is used for indicating to apply parking braking force to the rescue train; on the basis of keeping the braking force of the rescue train, the parking braking instruction is responded to, the parking braking force is applied to the rescue train, and the hooking train set is controlled to keep static on a ramp. By means of the method, the technical problem that in the related art, a train is easy to slide on a long steep ramp only under the condition that braking is kept is solved.