The present invention discloses a suckling period underwear, which comprises a front side, a rear side, a first shoulder strap, a second shoulder strap, side edges, a lower edge and a protection enclose, wherein the edges of the upper ends of a first cup and a second cup in the underwear are sew with high elasticity rubber bands, the edges of the lower ends are connected with zippers, the opening-closing way is diversified so as to conveniently feed breast, the inner surfaces of the first shoulder strap and the second shoulder strap are respectively provided with one or a plurality of flexible shoulder pads for massaging shoulders so as to prevent the shoulders from discomfort due to the long time breast feeding, the underwear is provided with Y-type connection straps so as to provide a certain fixation effect for nipples, replaceable breast pads are arranged between the Y-type connection straps and the inner sides of the cup so as to reduce the friction or collision between the nipple and the inner side of the cup, and by using the breast pads, the defect that the insanitation exists due to the milk leakage during the breast feeding can be solved, the drying state of the breast part can be maintained, and the all-around protection can be provide for breast-feeding women.