Battery box and box body assembly thereof

The invention relates to a battery box and a box body assembly thereof. The battery box comprises a box body assembly, the box body assembly comprises a box body and heat insulation supporting strips, the heat insulation supporting strips are fixed to the positions of the two long edges of a bottom plate of the box body, each heat insulation supporting strip comprises a supporting plate and a heat insulation layer arranged on the supporting plate, each supporting plate comprises a long-strip-shaped plate body and a foot pad fixedly arranged on the long-strip-shaped plate body, and the foot pads penetrate through the heat insulation layers; the foot pads and the lug plate penetrating holes are correspondingly arranged, and the supporting plates are provided with receding holes corresponding to the lug plate penetrating holes so that the connecting bolts can penetrate through the receding holes, the box body bottom plate and the heat insulation supporting strips can make rigid contact at the positions of the co