Abstract: A thermometallurgical separation technics was excogitated by the Northeastern University for the comprehensive resource utilization of the paigeite ore in Liaoning. To analyze the ecological pressure resulting from the process quantitatively, an attempt was made to calculate the ecological footprints caused by the whole industrial system, every link in production and products with a component-based model. The results showed that the ecological footprints caused by mining and processing every 10000t of paigeite ore are 2319.3023hm², where the separation by blast furnace is the biggest, i.e., 79% and only 1% is caused by mineral processing. As to the products, boron-bearing iron, the ecological footprints per 10, 000t in production is up to 7254.9849hm² which is bigger than that of the same outputs of the borax produced by either boron-rich slag or boron concentrate, i.e., 4438.6560hm² and 6177.4442hm², respectively. In view of the types of land occupied, the ecological footprints resulting from the utilization of fossil energy are dominant.