The stratigraphic occurcnccs of 3 classes, 44 form genera. 104 species and varieties of the Nlioccnc fossil Pteridophytic spores from the sedimems of the Nonh Taiwan including the Miocene formations on the western flank of the Chuhuangkeng section of Miaoli>hsicn, Kcclung-Yehliu section and Taipci-Sanhsia section of Taipci-hsicn were obtained. Nine new species and ihree new records were also proposed. The distributional range of these 104 pteridophytic spore laxa in 82 samples have been invcsiigatcd, then ten useful biostratigraphy cvcnls can be recognized. Based on those ten events, the Miocene sediments of Taiwan can be subdivided into nine spore zones. These spore zones have a close correlation with rock units. The fossil sporomorphs which appeared at first time in rock units, decreased its numbers gradually from the oldest to youngest rock formations. From ihe amount of the Magnastriatiies in the different rock units, ihc habitats of the youngest rock formations of Kucichulin and Nanchuang were dry. and the Kuanyinshan Sandstone was swamp and the older rock formations sSiowcd repealediy alternative swamp and dry conditions.