A display screen, an electronic device and a method for 3D feature recognition are provided. The display screen includes a plurality of display units distributed in an array across a display area of the display screen; a plurality of infrared emitting elements embedded in a first area of the display area of the display screen; and a plurality of photosensitive elements embedded in a second area of the display area of the display screen. The plurality of photosensitive elements can be combined into an image sensor. The plurality of infrared emitting elements is configured to emit infrared light for illuminating a target object in front of the display screen so as to form a plurality of light spots on the target object. The plurality of photosensitive elements is configured to receive target light spots reflected from the target object and convert the target light spots into photo-electrical signals for generating a target image of the target object.