Based on U/Th dates and 205 oxygen isotopic dates a record of the Asian Summer Monsoon (ASM) on millennial time scales was established during the Antepenultimate Glacial MIS8—MIS9 from stalagmite LM-1 in Laomu Cave from southeast of the Loess Plateau, the west of Henan Province, China. The minimum δ18O value of stalagmite LM-1 is -11.38‰, the maximum value is -6.99‰ and the vibration amplitude reach -4.37‰, mean -9.07‰, and showed this area was strongly affected by the Asian Monsoon system during the Antepenultimate Glacial. The δ18O record of stalagmite LM-1 is similar to that of the stalagmite LZ15 of Linzhu Cave in Shennongjia, Hubei Province, China. The precession cycle from the two stalagmites have some correlation with the same period of summer solar radiation of north latitude 65 , which shows Henan and Hubei are controlled by the same climate system in a long time scale and solar radiation is still the major factor of climate change. At the transition of MIS8/9, the record of LM-1 shows the same trends with the decline of CO2 content from the Ice core Vostok, Antarctic. So we can infer from that the content of CO2, CH4 and NO2 changing may amplify the climate fluctuation caused by the orbit driven.