MoS₂ nanosheets with the thickness of above 60 nm were prepared by mechanical stripping， a traditional two-dimensional material preparation method. The morphology and thickness distribution of MoS₂ flakes were observed by optical microscope and atomic force microscope， and a polarization Raman test system was built. According to the 1.8 eV bandgap of MoS₂ flakes， 633 nm （1.96 eV） and 458 nm （2.71 eV） lasers were selected to excite the resonance and non-resonance Raman scattering of MoS₂ flakes. The Raman scattering light was coupled into a spectroscope through optical fiber to obtain the Raman spectra， and the characteristic modes in the resonance Raman spectrum were determined by Lorentz fitting. By comparing with non-resonant Raman spectrum， it was found that the Raman spectrum of MoS₂ could arouse a new Raman mode in resonant state.In addition， the resonance Raman spectra and polar coordinates at different polarization angles from 0° to 360° were observed. It was found that all the modes in the resonance Raman spectra were polarization-dependent， and the ways of polarization-dependence were similar. The theoretical model of Raman tensor was also combined with the experiment， and the fitted intensity curve could almost coincide with the data points.