The invention discloses a
microsurgery sectioning knife and blade, and the
microsurgery sectioning knife comprises a front
cutting edge and a
tail blade fixing part, the front
cutting edge and the
tail blade fixing part are an integrated
metal part, the
cutting edge and the back of the blade fixing part are flat and straight, the thickness a is 0.2 mm-0. 5 mm, the cutting edge comprises a knife point and a cutting edge opening, and the knife point is an
acute angle. The front end of the cutting edge is an arc-shaped cutting edge opening and is gradually transited from the arc-shaped cutting edge opening to the straight cutting edge opening from the tool
nose, the length b of the edge, where the tool back is located, corresponding to the arc-shaped cutting edge opening is 0.5 mm-1 mm, and the length c of the edge, where the tool back is located, corresponding to the straight cutting edge opening is 1 mm-3 mm. The included
angle alpha between the edge where the knife back corresponding to the arc-shaped knife edge is located and the upper edge of the straight knife edge ranges from 5 degrees to 10 degrees, and the included angle beta between the edging
grinding face of the knife edgeand the opposite face of the knife edge ranges from 15 degrees to 20 degrees. When the sectioning knife is used under a
microscope, better
visibility is achieved, the puncture force passing through atest knife point is smaller than 0.4 N,
soft tissue can be easily punctured, and it is guaranteed that a puncture point is accurately positioned and reverse picking type sectioning is smoothly carried out.