BABY SLEEPING BAG

This disclosure provides a baby sleeping bag including a bag body and an arm securing structure in the bag body. The arm securing structure includes a securing sheet arranged on an inner wall of the bag body along a transverse width direction of the bag body. A limit space for securing the baby's arms is formed between the securing sheet and the inner wall of the bag body, and a size of the limit space is adjustable. When the baby lies in the sleeping bag, the upper body of the baby may be wrapped in the limit space defined by the securing sheet and the inner wall of the bag body, so as to limit the movement of the baby's arms, effectively preventing the arm from being stretched out of the sleeping bag, and thus avoiding the baby from catching a cold.