The present invention involves a cleaning sleeve for cleaning the oral cavity, suitable to be applied over a finger or a tool to clean the inside of the oral cavity. The cleaning sleeve has a flat-layered structure comprising a sleeve portion formed by laminated sheet-like fabrics and a grip portion formed by a single-layer sheet-like fabric, wherein the sleeve portion comprises a working layer and a sleeve layer； the working layer and the sleeve layer form a head at the top, of the cleaning sleeve； and the grip portion is integrally extended from the Working layer. The cleaning sleeve is formed by ultrasonically bonding the two sides of a piece of folded degradable nonwoven fabric.
