The knowledge about chemical weathering characteristics of the loess-paleosol sequence is of great significance for understanding how inland Asia aridifies, East Asian monsoon evolves and how global carbon cycle goes. However, very little is known about chemical weathering characteristics of the loess-paleosol sequence in Harbin, which is located at the easternmost end of the Eurasian loess belt and the forefront of the eastward movement of the aridification process of inland Asia.[Objective] This study is to explore chemical weathering characteristics and paleosol formation environment of the Huangshan rock core in Harbin.[Method] Samples of the loess-paleosol sequence were collected and analyzed for elemental geochemical properties, magnetizability and heavy mineral contents.[Result] The color of the paleosol in Harbin is grey-brown and grey-black, which is dramatically different from those(brownish red) in other areas. The loess-paleosol sequence is 68-74(on average 72) in CIA(Chemical Index of Alteration), which suggests that the sequence is moderate in chemical weathering. However, compared with the loess layers, the paleosol layers do not show any signs of higher degree of chemical weathering, but are quite close to or even lower than the loess layers in chemical weathering degree. The S1 and S3 paleosol layers were the lowest even among the loess-paleosol sequence. The loess layers in Huangshan rock core contain mainly SiO₂(61.02%), Al₂O₃(19.51%), Fe₂O₃(4.19%) and K₂O(3.03%), together amounting to 87.75% of the total of the loess layer in mass, while the paleosol layers contain SiO₂(65.85%), Al₂O₃(19.33%) and Fe₂O₃(4.23%), amounting to 89.41%. In terms of α^Al index characterizing element migration ability, the elements in the loess-paleosol core follow an order of α^Al_Ca(6.2) > α^Al_Na(2.8) > α^Al_Sr(2.0) > α^Al_Fe(1.53) > α^Al_Mg(1.51) > α^Al_K(1.46) > α^Al_Ba(1.28) > α^Al_Rb(1.23) > α^Al_Ti(0.91) > α^Al_Cs(0.75), showing relative depletion of element Ca, Na, Sr, Fe, Mg, K, Ba and Rb and relative enrichment of Ti and Cs elements in the process of chemical weathering. Magnetic susceptibility and heavy minerals analyses show that the paleosol is significantly lower than the loess in magnetic susceptibility(MS), and in content of ferromagnetic minerals too. as the ferromagnetic mineral in the paleosol is mainly magnetic hematite-limonite that does contain magnetite, while that in the loess is magnetite. The Huangshan core is 0.4 and 0.1 in average return coefficient(BA) and ba value(Bc), respectively, and the paleosol layer is higher than the underlying loess layer in Rb/Sr ratio, indicating that the paleosol layers were formed under a wet climate.[Conclusion] The Huangshan rock core has experienced moderate chemical weathering. Although the paleosols in Harbin were the products of the interglacial climate, they formed under cold and wet climate, thus keeping the paleosols less chemically weathered than the loess. Moreover, the cold and wet soil-forming environment also caused reduction and decomposition of the magnetite in the paleosol layer, thus making the paleosol layers relatively lower than the loess layers in MS. The soil forming environment of Harbin paleosol is similar to that of the Heilongjiang black soil, which, hence, can be called paleo-black soil.