A method of processing a superfine blade edge using a femtosecond laser the method being characterised by the following steps: primarily grinding a blade edge portion by using a grinding wheel , the blade edge being primarily ground in a direction vertical to a rotational direction of the grinding wheel ; and secondarily grinding at least a part of the blade edge portion by emitting a femtosecond laser to the ground blade edge portion in a lengthwise direction, wherein the secondarily grinding comprises: oscillating the femtosecond laser ; increasing a size of energy distribution of the femtosecond laser ; modifying the energy distribution of the femtosecond laser ; aligning a central portion of the energy distribution of the femtosecond laser to an end portion of the blade edge portion ; changing an advancing direction of the femtosecond laser and emitting the femtosecond laser to the blade edge portion via a movable objective lens; and emitting the femtosecond laser while moving, in the lengthwise direction of the blade, a stage on which the blade is placed such that the blade consists of a blade body portion having a flat shape and a blade edge portion extending from the blade body portion and inclined at a predetermined angle for cutting to form a sharp edge, and that the blade edge portion has a first inclined surface (142-1) and a second inclined surface (142-2), the second inclined surface (142-2) is formed through the primarily grinding, the first inclined surface (142-1) is formed through the secondarily grinding, and the first inclined surface (142-1) has a greater slope than that of the second inclined surface (142-2) with respect to the flat shape of the blade body portion . primarily grinding a blade edge portion by using a grinding wheel , the blade edge being primarily ground in a direction vertical to a rotational direction of the grinding wheel ; and secondarily grinding at least a part of the blade edge portion by emitting a femtosecond laser to the ground blade edge portion in a lengthwise direction, wherein the secondarily grinding comprises: oscillating the femtosecond laser ; increasing a size of energy distribution of the femtosecond laser ; modifying the energy distribution of the femtosecond laser ; aligning a central portion of the energy distribution of the femtosecond laser to an end portion of the blade edge portion ; changing an advancing direction of the femtosecond laser and emitting the femtosecond laser to the blade edge portion via a movable objective lens; and emitting the femtosecond laser while moving, in the lengthwise direction of the blade, a stage on which the blade is placed such that the blade consists of a blade body portion having a flat shape and a blade edge portion extending from the blade body portion and inclined at a predetermined angle for cutting to form a sharp edge, and that the blade edge portion has a first inclined surface (142-1) and a second inclined surface (142-2), the second inclined surface (142-2) is formed through the primarily grinding, the first inclined surface (142-1) is formed through the secondarily grinding, and the first inclined surface (142-1) has a greater slope than that of the second inclined surface (142-2) with respect to the flat shape of the blade body portion . <EOS>