Previous research indicates that portable X-ray fluorescence (pXRF) can be used for quantitative compositional analysis of bronzes non-destructively and in-situ. In order to investigate the bronze culture in the Xiangyun area of western Yunnan, we used pXRF to analyze 357 bronzes unearthed from cemeteries at Dabona, Jianchun and Hongtupo. The results show that the types of alloy are mainly copper and tin bronze, but there are also small amounts of Pb-Sn bronze and Cu-As alloy. The alloy ratio patterns of Sn to Pb of the three cemeteries are highly consistent and indicate that the bronze techniques used during different periods in the Xiangyun area all belong to “Kunming Yi” tradition. Some bronzes also contain iron in their matrix compositions. Dabona bronzes are almost free of iron while the other cemeteries have many high iron bronzes. The ancestors of Dabona area may have adopted different smelting techniques. All of the Cu-As alloy bronzes came from Hongtupo cemetery. It can be speculated that the Cu-As alloy, and even the technique of making it was introduced to the Xiangyun area from the northwest area along the semilunar culture communication belt.