The present invention provides a vertical air-conditioning indoor unit, which comprises a shell with a first air supply port on its front side; an air duct, which is arranged in the shell, has an air inlet and a first air outlet facing the first air supply port. In order to guide the airflow in the casing to the first air supply port, the inner wall of the air duct adjacent to the first air outlet is in a tapered shape in which the flow cross section gradually becomes smaller along the airflow direction; In the channel, and its tapered part defines an annular air outlet gap, the air guide is used to guide the airflow to the annular air outlet gap, so that the airflow is guided by the inner wall of the airway, gradually converges towards the center of the airflow, and flows out of the first The air outlet and the first air supply port; and the driving mechanism, which is used to drive the deflector to translate up and down, so as to adjust the size of the air outlet section of the top section and the bottom section of the annular air outlet gap, thereby changing the air supply of the first air supply port angle. The vertical air conditioner indoor unit of the present invention has better effects of long-distance air supply and strong air supply.