Abstract: Using IAP-AGCM,controled numerical experiments on SST and east Asian circulation have been performed and some conclusions as given below are reached:the abnormality of subtropical high has two-month lag response to SSTA of the tropical western Pacific、the south China sea and the Bay of Bengal; The abnormality of western Pacific subtropical high and the abnormality of eastern Pacific subtropical high always exist simultaneously,but the latter begins before the former. When the SST of the sea area above anomalously decreases (increases),the location of two zonal geopotential waves assembling in subtropical western Pacific is more to the south (north),and further more, the subtropical high is anomalously more to the south (north)too.Under the action of the SSTA above,when blocking pattern over east Asia land area appears,the location of the assembling waves is related to the location of the blocking high.It acts clearly on the abnormality of the subtropical high.