The invention discloses a current-sharing energy-saving type semi-circular air supply outlet and a determination method of an air supply outlet structure. The air supply outlet comprises two inclinededges, two vertical edges, horizontal edges and curved edges, wherein the horizontal edges and the curved edges form bottom edges; the two inclined edges, the two vertical edges, the horizontal edgesand the curved edges are connected with each other to form a closed polygonal structure, the two inclined edges, the two vertical edges and the bottom edges are symmetrical around the central axis, aplurality of baffles are arranged in an air outlet area of the air supply outlet, and the baffles are distributed on the central axis and the horizontal axis of the air supply outlet. The air supply area of the air supply outlet is smaller than that of a traditional air supply outlet, it is ensured that the air supply flow is sent to the designated area and effectively form a semicircle, the air amount which is diffused to the outside of the target area is reduced, the air supply is more concentrated, the energy consumption is reduced, and meanwhile, the airflow distribution is more uniform, and the requirement for the comfort level of a human body is met.