Abstract: Geo-acoustic characteristics inversion based on ambient noise is one of the hot topics in underwater acoustics.At present,most of noise field modeling methods rely on multidimensional seabed models,which increases the complexity of the inversion process.In order to reduce the number of parameters and improve the inversion efficiency effectively,a study of noise field modeling based on single parameter is carried out,and the correlation expression of ambient noise is also derived based on the single parameter model.By comparison with the traditional model,the validity of this model is verified.Based on the experimental data,the seabed single parameter inversion is made and the sediment type in the experimental sea area is determined as silty sand,this conclusion is in good agreement with the documentary record.