The invention discloses an air inlet spray head structure for metal-organic chemical vapor deposition equipment. The structure comprises an air inlet top tray flange and water-cooled air balancing plates, wherein the air inlet top tray flange has a round metal disk structure of which the middle is provided with a round concave pit; the round metal disk structure is partitioned into 2n fan-shaped regions by battens along the radial direction of the round concave pit; and n is an integer of more than 1; the water-cooled air balancing plates are organic source water-cooled air balancing plates and hydride gas water-cooled air balancing plates; and each fan-shaped region corresponds to a water-cooled air balancing plate. Due to the adoption of the structure, a reaction gas can uniformly entera reaction chamber so that a uniform growth air stream mode is formed for the gas in the reaction chamber.