Abstract:A high-resolution palaeoclimate record of recent 2 ka is obtained based on RRb/Sr and AMS 14C dating of Core DD2, which is located at the north of the mud area on the inner shelf of the East China Sea (ECS). 10 periods of low RRb/Sr are identified, which well agree with periods of lower temperature in China's history, and the lower temperature during about 990 AD is verified. According to the variation of RRb/Sr, the Sui-Tang dynasty Warming Period defined by Zhu Kezhen is confirmed on the whole, during which period a fluctuation of warm-cold-warm exists, and the cold period is during 800-890 AD. The Little Ice Age (LIA) extends from 1480 AD to 1890 AD, where 1520 AD, 1670 AD, 1780 AD and 1850 AD are cold.