Abstract: Evaporation duct is a kind of atmospheric duct that occurs easily on water bodies such as the ocean. In order to improve the prediction accuracy of the evaporation duct model, a non-iterative flux algorithm evaporation duct prediction model (NEW model) is established. In this paper, the sensitivity test of the NEW model based on the observational data from China Sea is carried out, and the results are compared with the four widely used evaporation duct models (PJ model, Babin model, NPS model and pseudo-refractive model). The relationship between the evaporation duct height and the meteorological ocean elements has been analyzed, and the difference and similarities between the non-iterative flux model and the traditional models are discussed. It is found that, for the sensitivity test of different marine meteorological factors, the non-iterative flux model is consistent with the traditional model. The evaporation duct heights from the NEW model are close to those from the Babin model and the NPS model under unstable conditions, while are slightly higher than those from the NPS model under stable condition. Therefore, the NEW model can effectively predict the evaporation duct. In this paper, the establishment and application of the non-iterative flux algorithm model are presented, and the NEW model provides a new idea for the update and model development of the evaporation duct predictive diagnosis algorithm.