Pre-closing device of automobile door

The utility model discloses a pre-closing device of an automobile door, comprising a central processing unit, a pressure sensor, an automobile-door angle detecting module, a servo motor, a power module, an I-shaped wheel and a pulling rope, wherein the pressure sensor is arranged on an automobile seat; the automobile-door angle detecting module is arranged on the automobile door; the servo motor and the I-shaped wheel are arranged on a bottom plate of an automobile carriage; one end of the pulling rope is connected with the automobile door and the other end of the pulling rope is connected with the I-shaped wheel; a rotating shaft of the servo motor is connected with the I-shaped wheel; and the central processing unit is respectively and electrically connected with the pressure sensor, the automobile-door angle detecting module, the servo motor and the power module. The pre-closing device disclosed by the utility model has the advantages that after a passenger sits on the automobile seat, the pulling rope is automatically controlled to close the automobile door by a certain angle along the horizontal direction, and the automobile door is positioned at the position with smaller opening angle, so that the passenger in an automobile can conveniently close the door.