The present application provides a cell centrifuge, a method, a controller, and a medium. The cell centrifuge includes a cup body provided with a centrifugation space and a first passage. The cup body has a rotation axis and is rotatable about the rotation axis. The first passage includes a delivery passage provided at the top of the cup body, and a curved passage provided on a side wall of the cup body. Two ends of the curved passage are respectively provided with a first opening and a second opening. The first opening is provided on an inner side wall of the cup body. The curved passage communicates with the centrifugation space through the first opening and communicates with the delivery passage through the second opening. The curved passage also includes at least one bent passage located outside the inner side wall of the cup body.