The invention relates to a plate viscous medium pressure forming rebound self-adaptive control method. The plate viscous medium pressure forming rebound self-adaptive control method comprises the following steps that I, fixing a medium bin, installing a plunger in the medium bin, and injecting a viscous medium into the medium bin; II, placing a plate blank at the top of the medium bin, then installing a female die on the plate blank and is fixing the female die, so that clamping the plate blank between the medium bin and the female die; III, pushing the plunger in the medium bin to move upwards at the speed V1, gradually attaching the plate blank to a cavity of the female die, and being the pressure P in the medium bin; IV, enabling the plunger to move downwards at the speed V2, so that reducing the pressure in the medium bin to be P1, meanwhile, stopping moving the plunger downwards, so that keeping constant the pressure P1 in the medium bin, and being the duration time t; and V, after lasting the pressure p1 for the duration t, moving the plunger downwards again at the speed V2 until completely unloading the viscous medium. The plate viscous medium pressure forming rebound self-adaptive control method has the advantages that a forming part can be repeatedly stuck the die in the unloading process and the residual stress is gradually released, so that the resilience is controlled.