The invention provides a hybrid optical fiber sensing system based on a phase generated carrier technology, which comprises a narrow linewidth laser, a modulator, a pulse generator, an isolator, an erbium-doped optical fiber amplifier, a circulator, an optical fiber grating, a pump source, a wavelength division multiplexer, an optical fiber DFB laser array, a Michelson interferometer, a dense wavelength-division multiplexing module, an avalanche diode detector, a photodetector array, a carrier wave circuit, a data acquisition card, a signal processing module and a display. Through adopting thephase generated carrier technology, distributed acoustic sensing and optical fiber DFB laser array mixed vibration or acoustic signal measurement are realized, the characteristic of high sensitivityof the optical fiber DFB laser array and the characteristic of mass channels of the distributed acoustic sensing technology are fused, and high-sensitivity weak signal distributed measurement is realized.