Climate change, especially dry-wet change, significantly influences human activities. Thus, it lays a foundation for study of dry-wet change in a certain area to reconstruct its past dry-wet change by a high resolution. Up till now, few research has been carried out to study high-resolution climate change, especially dry-wet change during the Little Ice Age in North China. In this study, an area in the Baiyangdian Lake (38°43'~39°02'N,115°38'~116°07'E) nearby Duancun(38°50'15.851"N,115°59'3.018''E) in Anxin County, Heibei Province,was chosen to drill (BYD-D) for its undredged characteristics and less human activities. The altitude and water depth of this area were 7.97 m and 2 m, respectively, and sampling depth was 99 cm. The lithologic character of drill hole showed no significant change, mainly deposit of grey black clay. Based on the results of three AMS- ~(14)C dating,through 99 samples of pollen,charcoal and grain size,this study reconstructed the characteristics of climate dry-wet changes and the relationship of human activity intensity in the region since the Little Ice Age. The results show that pollen content of trees before the Little Ice Age(ca.1340 A.D.) was mostly above 25%,indicating that vegetation in the basin was largely composed of forest and grassland. Additionally, it was indicative of coarse grain size of sediments, unstable sedimentary environment and relatively humid climate. In contrast, pollen content of arbor during the Little Ice Age (1340~1920 A.D.) reduced to below 15%. And pollen content of Chenopodiaceae, Urtica and Humulus which prefer dryness increased dramatically, a sign of overall drying climate. Whereas, there were noticeable differences between the degree of drying at different stages. In early stage of the Little Ice Age (1340-1580 A. D.),the pollen content of Chenopodiaceae which has a preference for dryness in sporo-pollen complex increased gradually, and pollen content of hygrophytes showed an opposite trend. Moreover, score of PCA axis 1 (PCA 1) primarily ranged from 0 to 1. All these factors suggest a relatively dry climate. This period witnessed the minimum concentration of charcoal,content of crop pollen (Poaceae ≥ 35 m) and phosphorus (P) content which are all associated with human activities, consequently suggestive of relatively weak intensity of human activities in the study area. During medium stage of the Little Ice Age (1580 ~1800A.D.),the content of Chenopodiaceae, Urtica and Humulus which prefer dryness reached peak value, and score of PCA axis 1 (PCA 1) was more positively biased than that of early stage of the Little Ice Age, which indicated drier climate. Furthermore, the highest concentration of charcoal,synarthropic plant,phosphorus (P) content,and content of crop pollen (Poaceae ≥35 m) implied significant increase of human activities. In late stage of the Little Ice Age (1800 ~ 1920 A.D.),pollen content of wet plant Poaceae and hygrophytes Myriophyllum reached the highest value, and score of PCA axis 1 (PCA1) was negatively biased, indicative of humid climate. During this stage, content of crop pollen (Poaceae ≥ 35 m),concentration of charcoal and phosphorus (P) content slightly reduced as compared to medium period, suggesting slight reduction of human activities as compared to medium period. After the Little Ice Age(1920 ~present),the pollen content of the wet Poaceae and the hygrophytes Myriophyllum decreased, and the climate developed toward aridification compared with the late Little Ice Age.