Armrest box assembly and automobile

The utility model discloses an armrest box assembly and an automobile. The armrest box assembly comprises a central armrest box and a guide rail, wherein the central armrest box can be used as an armrest and a seat; the central armrest box comprises a box body which can be used as a seat base and an armrest cover which can be used as an armrest and a seat backrest; the rear end of the armrest cover is hinged to the box body, and the armrest cover has a closed state capable of being used as an armrest and an open state capable of being used as a seat backrest; the guide rail extends in the front-back direction, and the box body is connected with the guide rail in a sliding mode. According to the armrest box assembly and the automobile, the central armrest box can be adjusted back and forth between the front row of seats and the second row of seats, a channel between the second row of seats can be utilized, the second row of seats can be changed into three seats from two seats, and high practicability is achiev