VEHICLE BODY UNDER STRUCTURE

The invention provides a vehicle body lower portion structure capable of improving air mechanical performance and improving driving stability. The vehicle body lower part structure comprises a guide plate which is arranged on a vehicle body of a vehicle and can move between a storage position covering the lower part of the vehicle body and an expansion position protruding downwards. Wherein the guide plates include a first guide plate and a second guide plate, the first guide plate is arranged in front of a pair of left and right front wheels of the vehicle, the second guide plate is arranged below the center of the vehicle body, and the protruding amount of the first guide plate and the protruding amount of the second guide plate are different when the first guide plate and the second guide plate are located at the unfolded position. 本发明提供一种车体下部结构，能够提升空气力学性能，且能够提升行驶稳定性。车体下部结构包括设置在车辆的车体上、且能够在覆盖所述车体的下部的收纳位置以及往下方突出的展开位置之间移动的导流板。其中，所述导流板包括第一导流板以及第二导流板，所述第一导流板设置在所述车辆的左右一对前车轮的前方，所述第二导流板设置在所述车体的中央下方，并且，所述第一导流板与所述第二