Half-cutter-width impact buffering plunge milling cutter

The invention provides a half-cutter-width impact buffering plunge milling cutter which comprises a cutter body, a plurality of blades and a cutter pad, and the blades are installed on the cutter pad and evenly distributed along the circumference of the cutter body. The blade is an indexable blade, and the cutting edge of the blade is a waveform-like curve; a stepped structure is designed on the front blade surface of the blade, so that not only can a macroscopic negative edge inclination angle be realized, but also a local edge inclination angle can be controlled, and the characteristics of slow cut-in, slow cut-out and gradual change of cutting width are realized. The blades are evenly arranged on the circumferential side face of the cutter, the alternately-arranged blades form a group, and the main cutting edges of the two groups of blades are staggered in the radial direction. According to the plunge milling cutter, the novel wave-shaped structure blades are arranged in a staggered mode, the cutting impac