The invention relates to dual-suspension equipment and devices for carrying a child. The equipment and devices comprise a frame, wheels mounted on the frame and a sitting and lying device for an infant to sit or lie on, and further comprise a seat hinged to the frame through a hinged seat connecting rod, the two sides of the sitting and lying device are respectively hinged to the frame through a set of connecting rod components, the frame comprises a first frame body and a second frame body which are mutually hinged, and the sitting and lying device is hinged to one end of a first seat bracket, a seat left inner connecting rod, a seat left outer connecting rod and one end of a second seat bracket through a first seat shaft, a second seat shaft, a third seat shaft and a fourth seat shaft in sequence; the other end of the first seat bracket, a seat right inner connecting rod, a seat right outer connecting rod and the other end of the second seat bracket are hinged through a fifth seat shaft, a sixth seat shaft, a seventh seat shaft and an eighth seat shaft in sequence; the first seat bracket and the second seat bracket can rotate in a range of 0-360 degrees relative to the seat left inner connecting rod, the seat left outer connecting rod, the seat right inner connecting rod and the seat right outer connecting rod.