Reinforced tail door structure of automobile

The invention belongs to the technical field of automobile tail doors, and particularly relates to an automobile reinforcing tail door structure which comprises a tail, a supporting rod and a damping limiting rod, a square reinforcing strip is installed on the inner top face of a compartment, and a sliding hole is formed in the reinforcing strip; the tail door is installed on the rear side of the compartment in a swinging mode through a hinge, a supporting rod is installed on the tail door in a spherical hinge mode, and the end, away from the tail door, of the supporting rod slides in the sliding hole. The supporting rod has elasticity, when the tail door is opened, the supporting rod slides along an inclined sliding hole formed in the compartment, and the end, connected with the tail door, of the supporting rod is pulled out; at the moment, a part of gravity of the tail gate is transmitted to the carriage through the supporting rod and is borne by the carriage; in this way, the tail door gravity needing to b