The invention belongs to the technical field of optical fiber sensing and signal processing, and particularly relates to a sound source positioning system based on optical fiber Michelson interferometers. The system is an array system formed by N optical fiber Michelson interferometers, and comprises a distributed feedback laser, a 1*N beam splitter, N 3*3 optical fiber couplers, 2N optical fibercoils, 2N faraday rotator mirrors, 2N PIN photodetectors, a data acquisition device and a computer loaded with sound source positioning software. Light emitted by the laser is split to N beams throughthe 1*N beam splitter and enters the N different optical fiber Michelson interferometers for interference, each optical fiber Michelson interferometer arrives at a different position of the sound source, and a time difference exists between signals arriving at the optical fiber Michelson interferometers. The position of the sound source can be calculated based on the time difference and through building a geometric model. The position of the sound source can be effectively determined, the sensitivity and the precision are high, and great application value in the sound measurement positioningfield is achieved.