The double-layer grid air outlet belongs to the double-layer adjustable louver air supply outlet. This series of air outlets can be directly matched with fan coil units or used at the end of air conditioning systems. The two layers of blades of this air outlet are cross combined, and the blade angle can be adjusted freely within the range of 0 '-180'. By adjusting the blade angle to different angles, different air supply distances and diffusion angles can be obtained. A regulating valve can be installed at the rear of the air outlet to control the air volume and speed within an appropriate range. The surface of the aluminum alloy air vent is treated with anodizing, and can also be electrostatically sprayed according to user requirements.