Method and device for processing coherent phase sensitive optical time domain reflectometer

The present invention provides a method and device for processing a coherent phase sensitive optical time domain reflectometer. The method comprises: a coherent phase sensitive optical time domain reflectometer is configured to extract the phase of the fiber to be measured, wherein the fiber to be measured is provided with an auxiliary weak reflection point which is configured to correction of the phase signals of the Rayleigh scattering light in the fiber to be measured, so that the problem is solved that the laser phase noise in the phase sensitive time domain reflectometer technology influences the measurement vibration information, and the phase noise of the laser is effectively reduced.