We use various of absolutely dated, high resolution records as lakes, peats, speleothems published in recent years to study the hydrological exhibition of 42 ka BP Event in China. We find the precipitation decreased around 42 ka BP in both southern and northern China. At the same time, tropical Africa, south Europe, Mideast, India, Korea, midcontinent of North America all presented a severe drought, which shows that the 42 ka BP Event resulted in the drought in vast areas in mid—low latitude of North Hemisphere. We discuss the possible mechanisms, the southward moving of Intertropical Convergence Zone and oceanic sea surface temperature changes together with the feedback of vegetations caused by variations of solar activity maybe induce the 42 ka BP Event. At the end, we prospect the fields need to be further studied on this event.