The invention discloses a whole bladed disc blade opposite blasting device. Two spoon-shaped rebound spray guns oppositely arranged on nozzles are installed in a frame structure of a spray gun supportthrough threaded structures, shots are sprayed to blades from the spoon-shaped spray guns on the two sides during shot blasting, a conventional direct spray gun one-side two-time shot blasting way ischanged, the opposite shot blasting way is created, the two sides of a blade type shot blasting portion produce the same shot impact force at the same time, then, the same pressure stress is produced, blade deformation caused after shot blasting is prevented, the distance between the two spoon-shaped rebound spray guns can be adjusted, the positions of the two spoon-shaped rebound spray guns arepositioned through scale labels on the spray gun support, the distance between the nozzles can be precisely adjusted according to different bladed disc blade distances through the adjustable structural arrangement, and the smallest distance of the spray guns meets the requirements of different parts.