Abstract: According to the fact that inversion complexity decreased with the number of parameters,a single parameter inversion scheme which conveniently obtains seabed property from range-intensity relation was proposed.Considering bottom impedance,the slope of bottom loss versus grazing angle F was established by fitting sound speed,density and attenuation.The acoustic field expression,described by F,was deduced based on the normal mode approach. Accordingly,an inversion scheme using a least-squares fitting to transmission loss was designed.Due to reducing the number of parameters to one,this method only requires single hydrophone and avoids complex measurement and optimization algorithm.Experimental data in East China Sea were inverted.The applications of F for transmission loss prediction and seabed property estimation were described.Both results were compared with the results from multiparameter hybrid inversion and measurement,and the agreement evaluated the validity of inversion.