Wall-mounted air conditioner indoor unit

The utility model provides a wall-mounted air conditioner indoor unit. The wall-mounted air conditioner indoor unit comprises a machine shell and a plurality of flow guide pieces. A first air supply outlet is formed in the machine shell, and an air channel communicated with the first air supply outlet is defined in the machine shell and provided with a first wall and a second wall corresponding to the two sides of the first air supply outlet in the width direction. The flow guide rods are arranged at the first air supply outlet at intervals in the length direction of the first air supply outlet, and each flow guide rod extends in the length direction of the first air supply outlet and is configured to guide at least part of airflow blown to the flow guide rod to the first wall and the second wall, so that the first wall and the second wall guide the air to the outer circumferential surface of each flow guide rod is roughly oval; the flow guide rod can rotate around a rotating axis parallel to the length direc