Multi-stage cutting grinding sheet and grinding equipment

The utility model belongs to the technical field of disc grinding machines, and particularly relates to a multi-stage cutting grinding sheet and grinding equipment. The cutting grinding piece comprises a grinding piece base body, the grinding piece base body is of a fan-shaped or circular structure, at least two stages of grinding areas are arranged between the inner diameter end and the outer diameter end of the grinding piece base body, and a plurality of racks and a plurality of grooves are formed in each stage of grinding area. A concentric circle or non-concentric circle arc-shaped partition groove is formed between every two adjacent stages of grinding areas, the grinding areas are separated through the arc-shaped partition grooves, a plurality of regular and different connecting ribs are arranged in the arc-shaped partition grooves, and the two ends of each connecting rib are connected to the ends of at least two racks in every two adjacent grinding areas respectively. According to the cutting and grin