This paper argues that the bronze knives excavated from Ba-Shu culture burials contain elements from both the Central Plains culture and the Northern culture. Through integrating these two exotic cultural elements, many new types appeared, and some localized types even became the major type of weapons in the Shu culture. Based on the diachronic change in the numbers of bronze knives belonging to different cultural origins, this paper divides the development of bronze knives into three general stages, namely the importation, localization, and transformation stages. The authors also analyze the historical background and identify a parallel developmental trend in the Ba-Shu culture. In general, the three stages refl ected by these typological changes can be viewed as: conservative to the Shang-Zhou culture, the pro-Chu culture, and a stage heavily infl uenced by the Qin culture.