Ball head vertical milling cutter for processing corners and bottom corners of narrow space

The invention discloses a ball head vertical milling cutter for processing corners and bottom corners of a narrow space. The ball head vertical milling cutter is used in the milling processing processof corner and bottom corner characteristics and transition parts of the narrow space of a structural part. The ball head vertical milling cutter comprises structures like a cutting part and a handle,wherein the cutting part comprises two bottom teeth, two peripheral teeth, a chip accommodating groove, bottom tooth center passing parts and peripheral tooth center passing parts; the bottom teeth are divided into the outer bottom tooth and the inner bottom tooth; the outer bottom tooth and the inner bottom tooth are distributed in a staggered manner; besides, the bottom tooth center passing parts are arranged, the outer bottom tooth participates in the material cutting process, and the inner bottom tooth performs yielding to prevent cutting quantity from being too large; the peripheral tooth on one side is provided