The invention relates to an automatic air-conditioner pipe folding and unfolding device. The automatic air-conditioner pipe folding and unfolding device comprises a movable winding drum support, a winding drum, a direct-current motor and a speed reducer provided with a clutch, wherein the winding drum, the direct-current motor and the speed reducer are installed on the winding drum support. The middle of the winding drum is perforated and a cavity is formed. An air-conditioner pipe connector is placed in the cavity and fixed to the winding drum. The direct-current motor and the speed reducer provided with the clutch are integrally installed and arranged on a winding drum shaft on one side of the air-conditioner pipe winding drum through a coupling. A synchronous clutch gear is installed on the side where the speed reducer is located, and connected with a rear-axle synchronous gear through a synchronous belt, and the rear-axle synchronous gear is arranged on a bearing wheel at the bottom of the winding drum support. The automatic air-conditioner pipe folding and unfolding device further comprises a fixed support connected with an aircraft gallery bridge. An elevator is arranged on the fixed support. The elevator is connected with the winding drum support to fix the folding and unfolding device to the fixed support. The automatic air-conditioner pipe folding and unfolding device meets airport requirements, and automatic folding and unfolding of an air-conditioner pipe are facilitated.