Interglacial climate is one of the major concerns in paleoclimate investigations.The stable oxygen isotope of a stalagmite(SJ5-6)from the Songjia Cave in northeastern Sichuan,central China,which is precisely dated with ~(230)Th dating method,show prominent paleoenvironmental changes during the MIS(marine oxygen isotope stage)9.The stalagmite of SJ5-6developed from 334ka to 320ka,apart of MIS9. The variations in delta~(18)O of the stalagmite are interpreted as the responses to the millennial-scale fluctuations of the Asian summer monsoon intensity during 334~320ka.The delta~(18)O record studied is roughly parallel with the other speleothemdelta18 O records recovered from the Asian summer monsoon region.In particular, there is a high similarity of temperature pattern between the stalagmite SJ5-6and the Antarctic ice core. This suggests that temperature changes over the Antarctica may play an important role in the evolution of the Asian summer monsoon during the past interglacial.