Automatic opening and closing driving mechanism for side door of motor vehicle and motor vehicle

The invention provides an automatic opening and closing driving mechanism for a side door of a motor vehicle. The automatic opening and closing driving mechanism comprises a fixed seat fixedly connected to a vehicle body and a mounting frame fixedly connected to the vehicle door, wherein the fixed seat is hinged to a rack connecting rod; the mounting frame is fixedly connected with a dustproof mounting box; a gear meshed with the rack connecting rod is arranged in the dustproof mounting box, and the rack connecting rod penetrates through the dustproof mounting box; the automatic opening and closing driving mechanism further comprises a motor mounted on the dustproof mounting box, and a rotating shaft of the motor penetrates into the dustproof mounting box and then is fixedly connected with the gear; and a dustproof assembly covering the rack connecting rod is further connected to the dustproof mounting box. The invention further provides the motor vehicle comprising the driving mechanism. The motor vehicle ad