Abstract: A quickly installed, expandable, and modularly designed louver awning includes several leg tubes, a ring beam frame disposed on upper ends of the leg tubes, and a louver system disposed on the ring beam frame. The ring beam frame includes several ring beams slidably installed on the leg tubes, ring beam linings are firmly disposed in ends of the ring beams, and the ring beam linings are connected to the leg tubes through first fasteners. The ring beams and the leg tubes are connected through leg tube linings and the ring beam linings, so that structural strength of the ring beams and the leg tubes is increased, a part quantity is reduced, assembly is easier to operate with a smaller error, and the fasteners are not exposed, thereby providing better aesthetic appearance.