Abstract: The present invention discloses a food slicing device. In the present invention, the opening of the horizontal shell disposed horizontally is a material output port; a material-input tube is disposed on the upper part of the shell, and the material-input tube extends upward to form a material-input port; a cutter unit with the same direction to the opening disposed inside the horizontal shell; the rotating shaft protrudes out of the bottom of the shell; a protective cover is disposed on the material output port, whose ring is inserted in the material output port, and the top portion of said protective cover extends outward to form a tongue portion for covering up the opening of said material output port of the shell. So the problem that fingers of consumer are injured accidentally by rotating blade of the cutter is solved.