A foldable vehicle frame includes a first main body, a second main body having a pedal portion and at least one joint portion, and a connecting mechanism connected to the first main body and the second main body. The connecting mechanism further includes a pair of rod parts, and the pair of rod parts respectively has a head end and a tail end. The head end is rotatably connected to the first main body, and the tail end is rotatably connected to the second main body, such that the connecting mechanism is turned over and stacked at a lower layer of the first main body, and the pedal portion of the second main body is folded under the turned-over connecting mechanism, so as to form a folded state. Furthermore, the connecting mechanism, the first main body, and the second main body are all unfolded simultaneously to form an unfolded state.