Abstract: With the support of remote sensing and GIS, the soil erosion amount in Chicheng County of Hebei Province in 1990 and 2000 was calculated by using the revised universal soil loss equation (RUSLE), and a soil erosion map was drawn according to the soil erosion intensity classification criterion. Based on these, the status and spatial distribution of water and soil loss in 2000 and the dynamis  and causes of the loss in 1990-2000 were analyzed. In 2000, the average soil erosion modulus in the County was 17.64 t·hm^-2·a^-1, belonging to mild erosion, and the water and soil loss mainly occurred on the hillside scrubland, grassland, and non-irrigated farmland. Comparing with that in 1990, the water and soil loss area in 2000 decreased markedly, with a decrement of 839.81 km², which illustrated that the performed water and soil conservation measures in Chicheng County in 1990-2000 were very effective

Key words: Ecosystem health, Soil magnetization, Wheat, Germination, Root vitality, Ecological indicator