Vehicle ground door structure and vehicle

The invention discloses a vehicle ground door structure and a vehicle. The vehicle ground door structure comprises an inner plate, an inner plate reinforcing plate and an outer plate which are sequentially connected. A cavity is formed between the inner plate reinforcing plate and the outer plate, a middle lock catch assembly is arranged in the cavity, the middle lock catch assembly comprises a middle lock catch mounting part and a lock catch back plate, the lock catch back plate is connected with the middle lock catch mounting part and the inner plate reinforcing plate, the middle lock catch mounting part comprises a bearing cavity, and the bearing cavity is connected with the bearing cavity. A bearing cavity is formed in the outer plate, a plurality of fixing parts are arranged on the periphery of the bearing cavity, one end face of the bearing cavity is connected with the inner plate reinforcing plate, a wide mounting hole is formed in the outer plate, and the periphery of the wide mounting hole is connect