Abstract: Recent researches unveil that the modern tidal depositional system, as a window of ancient tidal deposits, has provided a theoretical foundation and a recognition basis for the reconstruction of tidal depositional environment. The different tidal classification and tidal flat zoning systems were made upon the response of sedimentary environment to various tidal signatures. The research of microbiological deposits in the modern tidal system suggests that the biogenic tidal signal should be adopted to the study of ancient tidal deposits. The fruitful achievements of physical palaeotidal signature may provide a solid foundation for paleoenvironmental reconstruction. Based on the new progress in palaeotidal signatures, this paper takes the sedimentary sequence of the Lushan section in the Yuxi district as an example to provide a reference for regional paleoenvironmental reconstruction.