Based on the fractal theory and experimental data in wind tunnel, the fractal character of soil particle size in a short period was preliminarily discussed in this paper. Also, the trend of fractal dimension on soil surface during different deflation periods was analyzed. Some conclusions can be drawn as follows: (1) During the different blowing intervals, fractal structure exists in the grain size distributions of sandy loam and loamy sand. Furthermore, fractal characters of two soils don't change with the different wind speeds and time in the wind tunnel. But their fractal dimensions change as the time gone. (2) Whether the initial stage of deflation or the consequent stage with definite wind speed and time, the fractal dimensions of sandy loam are all smaller than that of loamy sand. (3) During the different soil deflation process, regression analysis indicated that there was significant positive correlation between the fractal dimensions of the grain sizes of the two soils with different texture and the content of the clay(< 0.05 mm), but the correlations between the fractal dimensions and the contents of the rest grain size are different. In generally, the more the content of clay is, the larger the fractal dimension of grain size is. (4) Because of the different situation of the two soils with different texture during the deflation process, correspondingly the fractal dimensions of grain size had different process of variation with the different wind speed and time.