The concept of the IGBP synthesis is used to analysis the natural proxy data indicated past 3000 years warm-cold changes in China.
The proxy data used in this paper are collected from the articles published in recent 20 years which are able to clearly indicate cold/warm changes, fairly dating, and less effected by human activities. The warm-cold change during the past 3000 years is reconstructed following steps. First, to identify the major cold stages preliminarily based the advances of glaciers in western China and the periglacial phenomenon in northern China. Second, to divide the warm-cold stages in additional evidence of paleosol from the regions sensitive to temperature change. Third, to accurate the division of warm-cold stages and to identify the warm or cold events in each stage based on the series of pollen, ice core, annual laminae gray level variations of stalagmite, treering, limatological records.   
It is found that, ①the warm-cold change reoccurs in a 1.3～1.35 ka period; Each period includes 4 stages: 300～350 a warm stage, 550～600 a cold stage, 200～250 a warm stage, and about 200 a cold stage. ②cold or warm events in each stage reoccurred in the 1.3～1.35 ka period too. ③The warm in the 300～350 a length warm stages is more sensitive than that in the 200～250 a length warm stages; the cold in the 550～600 a length cold stages is more sensitive than that in the about 200 a length cold stages. ④ Now is in a 200～250 a length warm stage started from the beginning of the 20th Century. The warm stages of 2.7～2.5 ka BP and 1.4～1.15 ka BP many be its historical analogies.