Coherent Raman spectroscopy and imaging technology， as a new type of label-free detection technology， has been widely used in biomedicine， material science， and other fields owing to its high specificity and noninvasive advantages. In recent years， the combination of time stretching and coherent Raman spectroscopy has effectively overcome the limitations of traditional spectrometers in terms of sampling rate and spectral range and provides a new idea for high-speed and broadband Raman spectroscopy and imaging. This paper first describes the basic principle of time stretching and its theory， summarizes the results of the application of this technology in other fields， and then systematically combs through the research progress of coherent Raman spectroscopy based on time stretching. Finally， it looks forward to the future development of coherent Raman spectroscopy based on time-stretching.