The invention discloses a soft redundancy method of a supersonic aircraft surface pressure measuring fault. The method comprises the following steps of acquiring a first flight parameter measured through using an inertial measurement device and acquiring a second flight parameter measured through using an embedded atmospheric data measurement device FADS respectively; according to the first flight parameter, determining a referential five-path pressure value Pic; according to the second flight parameter, determining an actual-measured five-path pressure value Pi; according to a comparison result of the referential five-path pressure value Pic and the actual-measured five-path pressure value Pi, determining a pressure measuring point of a fault; and according to a wind field correction relation between the first flight parameter and the second flight parameter, carrying out pressure restoration on the determined fault pressure measuring point. In the invention, soft redundancy to pressure measurement is realized, reliability of measured data is increased and cost is reduced.