The invention relates to a device and unit for carrying children. The device and unit comprise a vehicle frame, wheels installed on the vehicle frame and a sitting and lying unit body for infant sitting and lying. The multifunctional device and unit for carrying the children are further provided with a stool which is hinged to the vehicle frame through a hinged stool connecting rod. The vehicle frame comprises a first vehicle frame body and a second vehicle frame body which are hinged to each other. The sitting and lying unit body is formed by sequentially hinging one end of the first seat support, a seat left inner connecting rod, a seat left outer connecting rod and one end of the second seat support together through a first seat shaft, a second seat shaft, a third seat shaft and a fourth seat shaft and sequentially hinging the other end of the first seat support, a seat right inner connecting rod, a seat right outer connecting rod and the other end of the second seat support together through a fifth seat shaft, a sixth seat shaft, a seventh seat shaft and an eighth seat shaft. The first seat support and the second seat support can rotate 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 within the range of 0-360 degrees.