The invention relates to double-suspension and lying equipment and device for carrying a child and in particular relates to a foldable baby stroller. The foldable baby stroller comprise a frame, wheels mounted on the frame and a sitting and lying device for an infant to sit and lie down, wherein the sitting and lying device is provided with a limiting device; when a seat bracket I and a seat bracket II rotate on a same plane, the limiting device can be used for limiting relative rotation of the seat bracket I and the seat bracket II; two sides of the sitting and lying device are hinged to the frame through one group of connecting rod assembly respectively; the frame comprises a first frame and a second frame which are hinged to each other; in the sitting and lying device, one end of a seat bracket I, a seat left inner connecting rod, a seat left outer connecting rod and one end of a seat bracket II are hinged in sequence through a seat shaft I, a seat shaft II, a seat shaft III and a seat shaft IV; the other end of the seat bracket I, a seat right inner connecting rod, a seat right outer connecting rod and the other end of the seat bracket II are hinged in sequence through a seat shaft V, a seat shaft VI, a seat shaft VII and a seat shaft VIII; the seat bracket I and the seat bracket II can rotate relatively in a range of 0 to 360 degrees.