Abstract: This paper studies the lithofacies, temperature and composition of the fluid inclusions from multiple sets of strata in Qiangtang basin. The lithofacies feature shows that there exist many types of fluid inclusions with gas?liquid phases, of which gas phase is dominated by CH4, and some other compositions are H2S, H2, CO2 and N2. The temperature range of the fluid inclusions in this basin is wide: the freezing point temperature ranges from -2.0℃ to 14.2℃, the homogenization temperature is from 0℃ to 367℃. It is suggested that six main fluid events exist at least in Qiangtang basin, they are: 0~22℃, 76~85℃, 122~128℃, 172~189℃, 220~255℃, and 220~370℃, of which the first period was after the late tectonic uplift, so the inclusions do not contain hydrocarbons, nothing to do with the oil?gas migration and accumulation; the others (five?period inclusions) do have contained hydrocarbons, and should be related to the oil and gas migration and accumulation in Qiangtang basin