According to fuzzy rough set theory, acomprehensive data mining method is proposed and applied inspatial load forecasting (SLF). Based on rule reduction methoda cyclic sampling method is put forward; by means ofknowledge discovery in database (KDD) technique andaccording to the attribute values of acquired samples, theclustering of samples is conducted; according to clusteringcenter, according to the attribute of clustering center tocontinuous fetching, the fuzzy values are set and based oninclusion degree ...