Composite abrasive paper

A composite abrasive paper, comprising:

• a first abrasive comprising a first substrate, a first three-dimensional particle layer fixedly bonded to a surface of the first substrate, and a flexible microsphere layer fixedly bonded to a back surface of the first substrate;
• a second abrasive comprising a second substrate, a second three-dimensional particle layer fixedly bonded to a surface of the second substrate, and a third three-dimensional particle layer fixedly bonded to a back surface of the second substrate;
• wherein the first abrasive and the second abrasive are connected at an edge to form a connection part, and a middle of the first substrate and the second substrate forms a sealed cavity, and the second three-dimensional particle layer is provided opposite to the flexible microsphere layer in the sealed cavity;
• particles within each of the first three-dimensional particle layer, the second three-dimensional particle layer, and the third three-dimensional particle layer have the same shape, while the shapes of the particles in the first, second, and third three-dimensional particle layers are different from each other;
• the shape of particles within each of the first, second, and third three-dimensional particle layers is selected from a group consisting of a cone, a pyramid, a sphere, a triangular prism, a cube, a cylinder, and a multi-cube, different particle shapes providing different grinding effects;
• a dashed tear line formed by a plurality of discontinuous cuts is provided at a junction of the connection part and the sealed cavity, which makes the junction easy to tear, such that after tearing along the dashed tear line, the flexible microsphere layer and the second three-dimensional particle layer originally sealed in the sealed cavity can be flipped outwardly and exposed as additional abrasive surfaces, each having a grinding characteristic different from that of the first and third three-dimensional particle layers.