The sediment core GX149 collected from the western West Philippine Sea was selected for environmental magnetic studies to reconstruct paleoenvironment and trace the provenance of sediments. Rock magnetic results indicate that the low-coercivity magnetite is the dominant magnetic mineral in the sediments. The King Plot and Day Plot, which reflect the magnetic particle size, show that pseudo-single-domain (PSD) phase magnetic particles are predominant magnetic minerals in the sediments. The variation in magnetic parameters on the profile is obvious. Climate change indicated by the parameter of magnetic particle size (chi_(ARM)/chi) shows that high magnetic concentrations in sediments are related to cold periods, in which the amount of high coercivity minerals increased, and the grain size is coarser, while during warm periods the sediments are characterized by low magnetic concentrations, decreased amount of high coercivity minerals, and finer-grain size. Eolian transport by Asian monsoon is inferred to deliver increasing amounts of high coercivity minerals into the sediments during a colder, windier, and more arid condition. On the contrary, a decreasing amount of high coercivity minerals were delivered to sediments during a warmer and humid condition. The similar magnetic properties and the same glacial-interglacial cycles in magnetic profile between West Philippine Sea and South China Sea imply similar magnetic response to regional climate changes in East Asia.