The invention discloses a printed circuit board appearance machining method. After all edges of a printed circuit board substrate are widened outwards by 0.10 mm-0.20 mm according to a required size, the printed circuit board substrate is cut to form a primary material, edge milling is carried out on the primary material through a milling machine, and the printed circuit board with the required size is obtained. According to the printed circuit board machined according to the method, waste is removed through a punch die before edge milling carried out through the middling machine, the formed edge material needing to be removed is about 0.1 mm in width when edge milling is carried out through the middling machine, a milling cutter bears very small force, the cutter generates almost no deformation, and therefore the cutting path is nearly the same as an ideal line, appearance machining precision is guaranteed, and the requirement of customers for the appearance tolerance of +/- 0.05 mm is met.