HE1005-1439 is a Carbon Enhanced Metal-Poor (CEMP) star with [Fe/H] ~ - 3.0, which is significantly enhanced in elements produced by slow neutron-capture process (s-process; e.g., [Ba/Fe] =1.16±0.31, [Pb/Fe] = 1.98±0.19) and mildly enhanced in elements produced by rapid neutron-capture process (r-process; e.g., [Eu/Fe] = 0.46±0.22). The neutron-capture element patterns of the star can not be fitted by the s-process model or intermediate process (i-process) model. Studying the astrophysi-cal origins of chemical elements in the star based on the method of abundance decomposition can help understanding the formation and evolution of the CEMP stars. Fitting the abundance patterns of the neutron-capture elements in this star with the combination of s- and r-process patterns, we found that the neutron-capture elements of the star are mainly produced by the s-process of the companion AGB stars with low mass and low metallicity, and the r-process nucleosynthesis also contributes a little to this star.