The invention discloses a robot ejection mechanism. An output shaft of a servo motor (1) is connected with a lead screw (4) in front; the lead screw (4) is fixed on a cross beam (3) of a frame (16) through a bearing; a thread rod (5) fits the lead screw (4); the front end of the thread rod (5) is connected with a transverse buckle plate (7); the two sides of the buckle plate (7) are slidingly mounted on the frame (16) through slide blocks (13); a vertical linear motor (6) is mounted in the middle of the buckle plate (7); an ejection frame (10) is positioned in front of the buckle plate (7); sleeves (9) at the two sides of the ejection frame (10) coat slide rods (15) at the inner side of the frame (16); springs (14) additionally coat the slide rods (15); a fixture (17) for clamping an ejected object is arranged on the ejection frame (10); and the ejection frame (10) is provided with a barb (18) positioned in front of an output shaft of the linear motor (6). The robot ejection mechanism can conveniently adjust the ejection force and the ejection travel; and the ejection distance is controllable and precise.