The invention discloses a wagon door with a container door locking device. The wagon door comprises a left door assembly, guide wheel assemblies, the container door locking devices, a rubber sealing gasket, a right door assembly, pulley assemblies and rubber door stops. The left door assembly and the right door assembly each are formed by assembly welding of a door frame and a wagon door plate, one container door locking device is installed between the left door assembly and the right door assembly, and one container door locking device is installed between the right door assembly and a wagon body. Each container door locking device is formed by assembling a lock head, a lock rod, a lock seat and a handle. Four guide wheel assemblies are installed on the upper portion of the wagon door, four pulley assemblies are installed on the lower portion of the wagon door, a group of upper buffering rubber door stops and a group of lower buffering rubber door stops are installed on the two sides of the wagon door respectively, and the rubber sealing gasket is installed between wagon doors. The whole wagon door is rational in structure, the strength and rigidity of the wagon door can be effectively improved, the welding deformation is reduced, the external expansion resistance of the wagon door is improved, the structural reliability of a door lock mechanism can be improved, and the wagon door is convenient to operate and maintain.