The invention discloses a surgical milling cutter including a milling cutter bracket, a locking apparatus, a locking seat and a bottom main machine connected sequentially. It is characterized in that the milling cutter bracket includes a retaining seat (1-1) with a through hole. A finger guide (1-4) with an L-shaped bracket on the top of the finger guide is disposed at the upper part of the retaining seat (1-1), and a downward protrusion (1-9) is disposed at the end of the short side (1-8) of the L-shaped bracket. The lowest point of the protrusion (1-9) is lower than the lowest point of a cylindrical bit (1-10) during normal operation of the milling cutter. A bolt (1-3) with a through hole at its center is fixed in the cavity of the finger guide (1-4). A pressing plate (1-7) is disposed at the upper part of the retaining seat (1-1), and a nut (1-6) passes through the hole of the pressing plate (1-7) to connect to a bolt (1-3). The invention adopts the protrusion to prevent an object from contacting the cylindrical bit, thus to avoid cutting the object unevenly. Additionally, the finger guide may drive the L-shaped bracket to rotate to change the motion direction of the milling cutter, which facilitates the operation.
