The connection between Asian summer monsoon and northern high-latitude climate and solar forcing during the Holocene has been reported by the oxygen isotope records from Dongge cave, Guizhou province, China. In this paper, time series of carbon isotope from this stalagmite were reanalyzed via the ensemble empirical mode decomposition (EEMD). The decomposed results, intrinsic mode function, indicated three main time scale changes, e.g. interdecadal (imfc1-imfc3), centennial scale (imfc4-imfc6) and millennial scale (imfc7-imfc9). The delta~(13)C values reflect the types and density of vegetation and the production of soil CO_2 above the cave. Discrepancies and similarities both occur between delta~(13)C and delta~(18)O time series. At centennial to decadal scales, both isotopic records are closely coupled, among which the periodicities of 254 a and 116 a agree well with the atmospheric Delta ~(14)C (proxy for solar activity), denoting both soil CO_2 and the hydrologic circulation of low latitudes were controlled by solar activity. This relationship is further confirmed by the analysis of cross wavelet spectrum between the stalagmite delta~(13)C values and the detrended atmospheric Delta ~(14)C. The contribution of the imfc6 component is the highest, which presents a quasi-periodicity variability of 526 a, and is similar to the 550 a periodicity of the North Atlantic Deep Water formation, denoting a teleconnection between the carbon isotope variation and the environment change of the northern high latitude region. The trend of delta~(13)C variations is significantly different from delta~(18)O record, suggesting the production of soil CO_2 is not influenced directly by the change of solar irradiation. EEMD results show that the amplitude of imfc is about twice of IMFo in the same cycle, which means that the stalagmite delta~(13)C may be more sensitive to climate changes than the delta~(18)O. Hence, the delta~(13)C signal can be more suitable for the study of the relationship between solar activity and climate and/or ecological change on sub-millennial time scale.