Disclosed are a milk suction shield (1) and a breast pump with the milk suction shield (1). The milk suction shield (1) comprises a flexible inner structure (11) and a flexible outer structure (12) presented as being trumpet-shaped, wherein the inner and outer structures (11,12) are closed by each other to form a deformable space (13). The deformable space (13) is provided with a positive pressure hole (14) connected to a positive pressure gas line (31) of an air pump (3). The breast pump comprises a three-way component (2) and an air pump (3). The breast pump also comprises the above-mentioned milk suction shield (1). In addition to a negative pressure gas line (32), the air pump (3) also has a positive pressure gas line (31), wherein the positive pressure gas line (31) is connected to the positive pressure hole (14) of the milk suction shield (1) and the negative pressure gas line (32) is connected to a negative pressure hole (15) of the milk suction shield (1). Such a breast pump is capable of acting on a breast using air pressure and withdrawing milk using negative pressure meanwhile, the breast pump is capable of massaging the breast using positive pressure, promoting lactation, making the puerpera comfortable and achieving the effect of imitating infant-sucking using the simultaneous actions of the positive and negative pressures.La présente invention concerne une rondelle darrêt daspiration de lait (1) et une pompe tire-lait avec la rondelle darrêt daspiration de lait (1). La rondelle darrêt daspiration de lait (1) comporte une structure intérieure souple (11) et une structure extérieure souple (12) sous la forme dune trompette, les structures intérieure et extérieure (11, 12) étant fermées lune par lautre pour former un espace déformable (13). Lespace déformable (13) est doté dun orifice de pression positive (14) connecté à une conduite de gaz de pression positive (31) dune pompe à air (3). La pompe tire-lait comporte un composant à trois voies (2) et une po
