The invention relates to a box body cover plate opening and closing device for a box-type folding bicycle. The box body cover plate opening and closing device comprises a box body, a seat tube, a pushrod, a strut, a spring, a cam, a push rod seat a, a push rod seat b, a cover plate, a spring hinge a, a spring hinge b, a camshaft, a strut shaft, a strut slider, a strut slide groove, a spring positioning pin, a strut cone body, a motor, a head tube, a rear fork, a cover plate magnet attraction buckle a and a cover plate magnet attraction buckle b. The box body cover plate opening and closing device is characterized in that the push rod seat a and the box body are fixedly connected, the push rod seat b and the box body are fixedly connected, the push rod is sleeved with the push rod seat a and the push rod seat b, and the push rod can slide left and right; the strut slider is movably connected to one end of the push rod, and the other end of the push rod is in contact with the wheel surface of the cam; and the strut slider is sleeved with the strut slide groove, the strut slider can slide along the strut slide groove, and the strut is movably connected with the box body through the strut shaft. The box body cover plate opening and closing device for the box-type folding bicycle is quite easy to open and close, and is quite suitable for the box-type folding bicycle.