Abrasive cloth wheel base cover and abrasive cloth wheel using same

The invention discloses an abrasive cloth wheel base cover and an abrasive cloth wheel using the same. The abrasive cloth wheel base cover comprises an abrasive cloth wheel base cover body and a convex part; the convex part is arranged on the outer edge of the abrasive cloth wheel base cover body and extends toward the inner side of the abrasive cloth wheel base cover body; and the convex part isused for heightening the outer sides of abrasive cloths, so that the inner sides and the outer sides of the abrasive cloths can be synchronously compacted. By adopting the design, when the abrasive cloths are annularly arranged on the abrasive cloth base cover, the outer parts of the abrasive cloths are lifted due to the design of the convex part; when a downward-pressing block presses the abrasive cloths from top down, not only are the inner rings of the abrasive cloths stressed and compacted, but also the outer rings of the abrasive cloths are stressed and compacted through cooperation of the convex part and the dow