Automobile door connecting mechanism and automobile

The invention relates to an automobile door connecting mechanism and an automobile, the automobile door connecting mechanism comprises a first base, a second base, a first connecting part and a second connecting part are arranged on the first base in a spaced mode, and the first base is further provided with a matching arm; the second base is provided with a third connecting part and a fourth connecting part, the third connecting part is rotationally connected with the first connecting part, and the second base can rotate relative to the first base; the rotating piece is rotationally connected between the second connecting part and the fourth connecting part; and the limiting seat is connected to the first base, a limiting hollowed-out part is formed in the limiting seat, and the inner wall of the limiting hollowed-out part is used for being matched with the matching arm in a limiting mode. When the automobile door is opened, the limiting seat has the limiting effect on the matching arm through the limiting h