Using the 10 years observed data about runoff and sediment in the loess hilly forest region, the temporal change of soil erosion intensity in the reclaimed lands was analy zed. The results showed that with the increasing of erosion time, the soil erosion intensity in reclaimed lands would be increased apparently, and there had about 10mm soil layer be eroded away every year. In the 10th year, the 100.81mm depth of soil was eroded away, which was almost all the humus layer. At last, it is pointed that the increase of the erosion intensity, the decease of soil quality and the worse of the soil properties would aggravate the soil erosion intensity seriously.