The invention discloses a pin shaft milling machine, which comprises a frame, a power unit, a milling mechanism, a transverse positioning mechanism, a longitudinal positioning mechanism, a pressing mechanism and a feeding mechanism. The transverse positioning mechanism, the longitudinal positioning mechanism, the pressing mechanism The mechanism and the feeding mechanism are fixed on the worktable from left to right in sequence, and are located on a straight line. The milling mechanism is located inside the frame and below the pressing mechanism, and the corresponding working surface below the pressing mechanism is provided with a milling cut, the milling mechanism moves in the milling cut, the milling mechanism includes a saw blade set, the saw blade set includes a middle saw blade and two side saw blades, the middle saw blade and the two sides are coaxially installed together, The saw blades on both sides are located on both sides of the middle saw blade. The diameter of the middle saw blade is larger than that of the two side saw blades. The middle saw blade is used to cut the whole aluminum profile into multiple sections, and the two side saw blades are used to cut off the aluminum profile. cylinder on. The invention can process multiple aluminum profiles at one time, thereby improving the processing efficiency.