Lots of global changes at the Paleocene-Eocene boundary, Which were discovered by Deep Sea Drilling Project and which have been attracting geologists’ s attention, include: a change in lithology from glauconitic quartz sand to clay; a change in clay mineral suites from illite/smectite-dominated to kaolinite-dominated; the extinction and migration in the terrestrial flora; an increased species turnover rate in marine calcareous nanofossils; the extinction and lower diversity in the benthic foraminiferal assemblages; a considerable excursion in δ18O and δ13C values; a change in the evolution of land mammals; a significant reduction of the intensity of atmospheric circulation; a change in the style of abyssal circulation; an increase in water depth; and one to two order of magnitude increase in hydrothermal activity at the Paleocene-Eocene boundary. The Paleocene-Eocene boundary was the result of global tectonic events by researching lithology, palaeobiology, palaeoclimatology, palaeoceanography of the Paleocene-Eocene stratigraphic sections. The events include that global plate boundary rearrangement, changes in patterns of spreading centers and transform faults, and increase in hydrothermal activity.