The invention discloses an automatic folding device for a baby
carriage cabin, which comprises an
insertion pocket seat connected with a baby
carriage frame, a seat
cushion, a backrest and armrests, the seat
cushion, the backrest and the armrests are respectively hinged with the
insertion pocket seat, a pedal plate is arranged at the front end of the seat
cushion, and the baby
carriage cabin further comprises a ventilation device for cooling a baby on the backrest. The ventilation device comprises a fan installed on the backrest, a temperature sensor used for measuring the temperature of a baby and a controller installed on the baby carriage, the fan is electrically connected with one output
signal of the controller, and the temperature sensor is electrically connected with one input
signal of the controller. According to the baby carriage, the riding environment can be kept sweat-free and cool, the phenomenon that large-area prickly heat occurs on the
body surface of a baby due to soaking of sweat when the baby rides the baby carriage for a long time is effectively prevented, meanwhile, the discomfort problem that the back of the baby sweats when the baby rides at high temperature is solved, the baby is kept cool, and the riding comfort of the baby carriage is greatly improved.