Supporting rod, vehicle transporting frame and container

The supporting rod is used for supporting a first component and a second component which are spaced, the first component can move relative to the second component, and the first component is provided with a supporting shaft. The supporting rod comprises a supporting rod body and a self-locking mechanism. The self-locking mechanism comprises a lock seat and a lock tongue. The lock seat is arranged on the supporting rod body and used for being in lap joint with the supporting shaft. The spring bolt can rotate relative to the lock seat so as to be switched between an unlocking position and a locking position, the spring bolt can be always kept at the locking position without external force, when the spring bolt is located at the locking position, the spring bolt and the lock seat form a containing space, and the supporting shaft can be clamped in the containing space so that the first component and the self-locking mechanism can be matched in a locking mode. In the process that the supporting shaft enters the co