Abstract: Analytical results of sound velocity and spectrum for seafloor sediment are obtained by the three parameters(velocity-wave-amplitude) discrimination technique.Based on the three-parameter method,an understanding is gained of the physical condition and structural character-istics of seafloor sediment,which is combined with other geological information of the sedimentary layer to synthetically discriminate the properties of seafloor sediment.Experimental results show that,by using the relationship between sound velocity,wave form envelope,amplitude shape and size,and such parameters as sedimentary structure,microstructure,bedding,grain composition,mineral composition,and physical-mechanics,etc.,the basic properties of the shallow surface seafloor sediment in the experimental sea area can be discriminated and the burial depth of traces of ancient marine transgression and regression events in the borehole cores of seafloor sediment can be divided,thus contributing to the practice of acoustic remote-sensing and telemetering seafloor sediment.