Automatic car window closing device

The utility model relates to an automatic car window closing device which comprises a rainfall sensor (100), a car window sensor (101), a driving motor (102), a car window controller (104), an enabling switch (103), a judging device (104) and a buzzer (106), wherein the rainfall sensor (100) is used for sensing whether it rains or not; the car window sensor (101) is used for sensing the position of the car window so as to learn whether the car window is closed or not; the driving motor (102) is used for lifting the car window; the car window controller (104) is used for controlling the driving motor (102) according to signals of the rainfall sensor (100) and the car window sensor (101) so as to lift the car window until the car window is closed; and the enabling switch (103) is used for opening or closing an automatic window closing function of a car. By utilizing the automatic car window closing device provided by the utility model, the car window can be automatically closed in rainy days, therefore, property loss caused by rain damage as the window of the car parked in an open park is not well closed can be avoided.