The invention discloses a fabricated wall mounting plate structure, and relates to the technical field of indoor decoration. The fabricated wall mounting plate structure comprises a bottom plate, a wallboard, a top plate and soft bags, a plurality of clamping columns are arrayed on one surface of the wallboard, protrusions are arranged on the upper surfaces of the clamping columns, a plurality ofpartition plates are further arrayed on one surface of the wallboard, clamping grooves are formed in one side faces of the soft bags, grooves penetrate through one surfaces of the clamping grooves, adecorative frame is arranged on the peripheral side face of the wallboard, a first insertion plate is arranged on the bottom face of the decorative frame, a first plate groove is formed in the upper surface of the bottom plate, second plate grooves are formed in the upper surface of the decorative frame, and a second insertion plate is arranged on the bottom face of the top plate. According to thefabricated wall mounting plate structure, by arranging the clamping columns, the protrusions, the grooves, the top plate and the bottom plate, the wall mounting plate is easier to assemble, the softbags can be replaced independently, the replacement method is simple, and the good popularization prospect is achieved.