This study, based on different investigative documents and analytical methods, elucidates spatial distribution of habitats for major invasive exotic plants, <i>Leucaena leucocephala</i>, in Taiwan. Results show that <i>Leucaena leucocephala</i> is most harmful to broad-leaved trees and its invasion directly relates to changes in the physical environment. <i>Leucaena leucocephala</i> can bloom and bear fruits all year round and during the period of seeds sprouting and saplings, the invasion varies greatly among different soil types. <i>Leucaena leucocephala</i> prefers weakly acidic soil, though it grows well with other soil textures and nutrients as well. The average spreading rate of <i>Leucaena leucocephala</i> is 3.55 ha year<sup>−1</sup> on abandoned farm land calculated from the aerial photographs taken in 1982, 1992, 2003, and 2007.