Through integrated analysis of the chroma parameters, magnetic susceptibility, grain size and Rb/Sr ratio on the Tuojiawan loess-paleosol profile in Yunxi County, the correlation between the features of chroma parameters and palaeoclimate change in the upper reaches of Hanjiang River was revealed. The results showed that: a* was strongly correlated with the content of iron oxide, and the average value of a* was significantly different between loess and paleosol layers, and followed the order of S0(6.34)＞MS(5.52)＞Lt(5.18)＞L0(4.98)＞L1(4.82)＞T1-al2(3.66). L* was negatively with the content of iron oxide and the organic matter, with iron oxide having a agreater effect on L*, which reached the peak in the lows layers. h* was the lowest (68.64°) in the palwosol layers, but was high in the loess layers. In contrast, a*/b* was high in the paleosol layers (0.39), but was low in the loess layers. In Manlan Loess, there were two weak paleosol layers, i.e. L1-S2 and L1-S1, which showed higher a* and a*/b*, but lower of L*and h* than Manlan Loess. h*, a*/b*, L* and a* could be used as good indicators of climate change. A high a* and a*/b*, or a low L* and h* indicated that the climate was warm and wet, and the pedogenesis was strong. In conclusion, h*, a*/b*, L* and a* together recorded climate evolution since the late Pleistocene: the climate was cold and dry during the late Pleistocene, but a short warm and wet period happened in the glacial period (27.3-21.6 ka B.P.), Then the climate gradually became warm and humid during the early-mid Holocene. However, cold and dry climate appeared again since the late Holocene in the region.