Abstract: Making use of the meteorological data that the Chinese National Climate Center provided in internet, and according to the analysis of data and ascertain of basic parameters about short-wave net radiation model, short-wave net radiation model in China land was set up in this paper. The nonlinear regression model of reflectivity suit to the northeast area and the no-desert area in the northern Xinjiang in China was put forward. According to the experience coefficient of sunshine percentage and absolute humidity which influenced to short-wave net radiation, the results showed that the sunshine percentage was the main influences factor, and that the fitting accuracy of this model in higher elevation was higher than that of lower elevation.

Key words: Short-wave net radiation model, Short-wave net radiation model, Reflectivity model, Sunshine percentage.