A paper diaper with front and back leak-proof three-dimensional shield comprises a hydrophilic surface layer (1), a waterproof bottom layer, and a water-absorbing cotton core layer (2) arranged therebetween. The two lateral sides of the paper diaper are respectively provided with a lateral leak-proof three-dimensional shield (3), in which elastic bands (5) capable of longitudinally shrinking are arranged. The two longitudinal ends of the three-dimensional shield (3) are stuck with the hydrophilic surface layer (1) at the outside of the two longitudinal ends of the water-absorbing cotton core layer (2). Preferably, the shrinking length of the elastic bands (5) is greater than the longitudinal length of the water-absorbing cotton core layer (2).When the paper diaper is used, the elastic bands (5) are stretched to lift the waterproof bottom layer to form a certain height, thus the front end and the back end of the paper diaper generate good leak-proof effect. In addition, a water-absorbing layer (6) additionally arranged on the longitudinal ends of the water-absorbing cotton core layer (2) can realize more obvious leak-proof effect. An elastic waistband (7) is adhered on the back surface of the waterproof bottom layer to ensure more comfortable and close-fitting to wear.Linvention porte sur une couche-culotte en papier comportant une protection tridimensionnelle anti-fuites avant et arrière, laquelle couche-culotte en papier comprend une couche de surface (1) hydrophile, une couche inférieure imperméable à leau et une couche de noyau (2) en coton absorbant leau, disposée entre elles. Les deux côtés latéraux de la couche-culotte en papier comportent respectivement une protection tridimensionnelle (3) anti-fuites latérale, dans laquelle sont disposées des bandes élastiques (5) aptes à se rétrécir longitudinalement. Les deux extrémités longitudinales de la protection tridimensionnelle (3) sont collées à la couche de surface (1) hydrophile au niveau de la partie extérieure
