A series of abrupt events of Asian monsoon occurred in the Holocene, of which the 9.2 ka BP event has received less attention, and its existence and genetic mechanism are still controversial. Based on the Community Earth System Model (CESM), this study has carried out the transient integral climate simulation test (Nanjing Normal University-12ka, NNU-12ka) since the Holocene, compared the reconstruction data with the Transient Climate Evolution over the last 21,000 years (TraCE-21ka), and explored the spatial and temporal characteristics of the 9.2 ka Asian weak monsoon event and its causes. The main progress is as follows: the solar activity sensitivity test of NNU-12ka presents the Asian weak monsoon event around 9.6-9.4 ka, at this time, the total solar radiation decreased by 0.38 W m-2, and the average summer precipitation in the Asian monsoon region decreased by 0.17 mm day-1. However, the results of the total forcing test based on TraCE-21ka show that the glacier melt water and the ice cover change have no significant impact on the Asian monsoon change in this period. In the NNU-12ka solar activity test, the summer precipitation in the Asian tropical monsoon region decreased significantly, and the precipitation in Northeast China increased slightly. The reason for the weakening of the tropical monsoon is that the sudden drop of solar radiation leads to the weakening of thermal difference between the land and the sea, strengthens the sea level pressure of Asia"s land, causes the abnormal subsidence movement of the tropical monsoon region, suppresses the transmission of water vapor to the Asian monsoon region, and then weakens the monsoon through dynamic process.