The invention relates to a feeding and polishing mechanism. The feeding and polishing mechanism comprises a B-core plate feeding mechanism, wherein a discharging port of the B-core plate feeding mechanism is connected to a feeding port of a B-core plate polishing mechanism; and the discharging port of the B-core plate feeding mechanism is vertically downward and the plate surface level of the B-core plate is horizontal, the B-core plate polishing mechanism is arranged beside the discharging port of the B-core plate feeding mechanism, and B-core plate side edge polishing mechanisms are arrangedon the two sides of the discharging port of the B-core plate polishing mechanism. According to the feeding and polishing mechanism, the core boards matched with the specification size are put into the core board feeding mechanism, and polishing operation is carried out through the core plate polishing mechanism, so that the surface of the core plate is smooth and the two sides of the core plate are more smooth, and the bonding quality and efficiency of the plate can be improved.