Locking structure for rear door of transport vehicle

The utility model discloses a transport vehicle back door locking structure which comprises a carriage, a back door and a lock catch, one end of the back door is connected with the carriage through a hinge, the other end of the back door is connected with the carriage through the lock catch, and a locking structure is arranged on the front side of the carriage. By arranging the locking structure, the locking structure can limit the rear door for the second time, the rear door can be more stable through the lock catch matched with the carriage, and goods are prevented from falling off from the rear door due to the fact that the rear door is collided or the lock catch is bumped to be separated from the rear door and opened in the running process of a vehicle. The problems that in the actual driving process, due to the fact that cargoes in a carriage collide the carriage or the carriage is driven on a bumpy road section, a locking structure is prone to slipping and damage, a lock head is not firmly locked, artic