Abstract: An experiment of radio wave propagation including different bands( L ,S , C , X) is introduced in this paper. It was held on the sea area near Qingdao city, and different propagation models were listed, including statistic Hata model , Longly-Rice model and deterministic parabolic equation model. After the comparison between the measured data and the model data, we found that in L band the measured loss data is close to the Hata model, but most of them is larger than the Hata model.And in S band the data is close to the Hata model too,but in the long distance, the measured loss data is less than the Hata model.And in C band the data is very consistent with the propagation loss model of the deterministic evaporation duct, and the Hata model is no longer applicable. In X band , the measured data is close to the standard atmospheric propagation model and the Longly-Rice model, but these models underestimate the actual transmission loss, and the Hata model is no longer applicable.