The main purpose of the past global climate change research is to provide reference for the prediction and simulation of future related study. Asian monsoon system, impacts the monsoon region humanity's livelihood and the agricultural development through the interaction of ocean-land-atmosphere,is an important part of the global climate system. Especially, most of the population and agricultural areas in our country are distributed in the monsoon region, the amount of monsoon rainfall is related to all aspects of the national economy and people's livelihood. Hence,the intensity of monsoon forecast will be very urgent and necessary. Here, we present a 360mm-long stalagmite (WX0541A) obtained from Wanxiang Cave, Gansu Province, China (33019'N, 105o00'E; ca. 1200m a.s.l.),located near the northern limit of the Asian summer monsoon (ASM). The ventilation of Wanxiang Cave is weak, with a temperature of 11 ℃ and the relative humidity 100% throughout the year. 828 oxygen isotopic measurements and 6~(230)Th ages characterize high-resolution record of the ASM variability from ca. 104 ~ 92ka B.P., which covers most part of marine isotope stage MIS 5c~5b. The results demonstrate that ASM shows a trend of gradual weakening during 104~92ka B.P. Comparison Wanxiang delta~(18)O record with Sanbao (31°40'N, 110°26'E; 1900m a.s.l.) in Hubei Province and Kesang (42°52'N, 81°45'E; 2000m a.s.l.)in Xinjiang record shows that they exhibit a highly similar variation tendency during the most part of the study period, especially in the MIS 5c, when the ASM significantly enhanced. Hence, it seems reasonable that the fringe of the ASM was far northwest of its current position during the MIS 5c, with above-mentioned 3 caves included within the region controlled by the ASM at the time. However, those stalagmite records do not conform to the negative rule of ASM advance during the extreme weakening period, just like MIS 5b. One possible reason is that it is connected to the change of summer:winter precipitation ratio or the moisture source area.