The invention discloses a fairing blanking machining method. The fairing blanking machining method comprises a pressure blanking machine. A tool of the pressure blanking machine comprises an upper die, a lower die and a locating plate. A boss is formed on the top of the lower die, and a groove is formed in the top of the lower die. The locating plate is arranged at one end of the lower die. the upper die is arranged on the lower die in the mode that the upper die can do reciprocating motion in the vertical direction and faces the groove directly. A pair of fairings to be provided with notches through blanking are clamped on the outer side of the lower die. The upper side edges of the pair of fairings to be provided with the notches through blanking are abutted against the two side walls of the boss correspondingly. The rear end faces of the pair of fairings to be provided with the notches through blanking are abutted against the locating plate, and thus the to-be-blanked parts of the pair of fairings to be provided with the notches through blanking is arranged in the air above the groove. The manual pressure blanking machine makes the upper die to move downwards until the upper die moves into the groove, thus the to-be-blanked parts are blanked off, and the notches are formed. According to the fairing blanking machining method, the problems of serious deformation, large burrs and the like after milling machining of a part are avoided, and the machining quality is improved greatly.