The invention provides a distributed fiber white-light interference sensor array based on tunable Fabry-Perot resonant cavity, which is composed of a duplex photoelectric device, a tunable Fabry-Perot resonant cavity, a single-mode connection fiber and a sensor, wherein the tunable Fabry-Perot resonant cavity is composed of a scanning prism, a self-focusing lens, and a single-mode optical fiber with partial reflection surface; the duplex photoelectric device is composed of a wide-spectrum light source with a common base, an emitter and a collector, a photodetector, and a beam splitter prism; the beam with a certain spectral width is emitted by the light source to the resonant cavity directly through the beam splitter prism and is reflected multiple times by the left and the right surfaces of the resonant cavity to obtain a signal light; and the signal light outputted from the right cavity surface enters the sensor through the single-mode connection fiber, reflected by the left and the right end faces of the sensor, returns along the original path to the resonant, and is outputted from the left cavity surface to the photodetector. The distributed fiber white-light interference sensor array has a common light path structure and has the advantages of good temperature stability, simplest optical fiber path structure, low cost and high practicality.