A blade structure of a lawn mower, comprising a blade body, wherein the blade body is provided with a rotating shaft center, and the blade body defines a wing piece on each side of the rotating shaft center, and the rotating shaft center corresponds to the wing piece imaginary one An imaginary circle centered on the axis of rotation, the edge of the blade is provided with a pair of guiding edges which should be imaginary circle positions and shapes, so that when the blade body rotates, the guiding edge is located on the rotation track represented by the imaginary circle. Reduce the impact and entanglement of foreign objects, thereby increasing the efficiency of mowing.一種割草機之刀片結構，其包括有一刀片本體，於該刀片本體設一旋轉軸心，刀片本體沿該旋轉軸心往兩側各伸設一翼片，由該旋轉軸心對應翼片假想一以該旋轉軸心為中心之假想圓，該翼片端部設一對應該假想圓位置及形狀之導引緣，藉以當刀片本體旋轉時，導引緣則位於假想圓所呈現之旋轉軌跡上，減少對異物之碰擊及勾纏，進而增加割草效率。
