Anti-falling cup sleeve

The utility model discloses an anti-falling cup sleeve which comprises an annular cup sleeve body, the cup sleeve body comprises a base layer and an expansion layer, a plurality of folding areas are arranged on the base layer, the expansion layer is tightly attached to the inner ring wall of the base layer, the expansion layer comprises super absorbent resin, the expansion layer is composed of a plurality of strip-shaped expansion bags, and the super absorbent resin is located in the expansion bags. According to the milk tea cup, the expansion bag and the super absorbent resin in the expansion bag are arranged, the super absorbent resin absorbs water and expands, then the expansion bag is tightly attached to the cup wall, and in addition, the super absorbent resin has water absorption, so that the outer base layer is prevented from being soaked by water on the milk tea cup; by arranging the folding area, the contact area between the cup sleeve and the cup wall is increased, the friction force between the cup