In this paper, 165 samples for 33 m cores (15800 ~ 12500 cm, 2.6 ~ 2.1 Ma) from Haojiatai area in the Nihewan Basin was used for high-resolution pollen analysis. Sediment sample collection sites are located in the NHA borehole at Haojiatai, eastern part of the Nihewan Basin, Yangyuan County, Hebei Province. The drilling coordinates are 40°13'0.4"N, 114°38'32.3"E and 938 m a. s. 1. Combined with the paleo-magnetic dating, vegetation and climate change process was reconstructed from 2.6 Ma to 2.1 Ma based on pollen assemblages and PCA analysis. The results showed that: 1) During the period of 2.60 ~2.47 Ma, the pollen assemblages were characterized by high percentages Pinus (more than 40%) and high percentages of Picea (more than 60%) alternation and the PCA axis 1 and axis 2 scores fluctuated significantly, suggesting that the vegetation also should be the alternating of the pine forest and spruce forest, and climate changed serious. It was cold at 2.60 ~ 2.57 Ma and 2.53~2.51 Ma, which generally corresponding to MIS 102 and MIS 100, and it was cool and dry at 2.49~ 2.47 Ma, generally corresponding to MIS 98,but it was warm period at 2.57 ~2.53 Ma. 2) During the period of 2.47 ~2.33 Ma, the pollen assemblages were characterized by high percentages of Picea (more than 40%), Artemisia and Chenopodiaceae (more than 20%) and the scores of PCA axis 1 were high,indicating that the vegetation in the study area were dominated by forest-steppe or spruce forest, and the climate was cold and dry, especially at 2.47~2.42 Ma, which generally corresponding to MIS 96.3) During the period of 2.33 ~2.14 Ma, the pollen assemblages are characterized by high percentage of Pinus (more than 50%),and high percentages of broadleaved trees (more than 5%) and PCA axis 1 and axis 2 scores had the most negative values, indicating that the vegetation is a mixed forest or patches distribution of pine and broad-leaved trees, and the climate was the warmest and wettest, while from 2.29 Ma to 2.24 Ma, PCA axis 1 score became much higher, suggesting the climate became cold, which generally corresponding to MIS 88 and MIS 86.