Cross beam guide rail structure of numerical control gantry machining center

The utility model relates to the technical field of numerical control gantry machining centers, and discloses a numerical control gantry machining center beam guide rail structure which comprises a beam, a guide groove is formed in the front face of the beam, a guide block is slidably connected to an inner cavity of the guide groove, a sliding groove is formed in one side of the top end of the beam, and a movable block is slidably connected to an inner cavity of the sliding groove. A supporting block is fixedly connected to the other side of the top end of the cross beam, a driving motor is installed on one side of the movable block, a threaded rod is in transmission connection with an output shaft of the driving motor, one end of the threaded rod movably penetrates through the surface of the movable block and extends to the upper portion of the supporting block, the surface of the threaded rod is sleeved with a ram in a threaded mode, and a connecting assembly is arranged between the ram and the guide block.