The study of a binaural bronze Zeng of the Eastern Han Dynasty in Guiping Museum is of importance for research on the development of bronze smelting and casting technology in the Guangxi area. However, having been kept in the local moist environment for a long time, the bronze Zeng has serious mineralization. Restoration of the object and improvement of its conservation conditions is extremely urgent. In this paper, X-ray images, optical microscopy, scanning electron microscopy, energy spectrum analysis and simulation experiments were used to study the casting process, the alloy composition, and the corrosion products of the Zeng. The results show that the bronze Zeng were formed by integral casting. The technologies of the wheel system, scraper and after-casting engraving were used in the process. The ring foot of the model was cut to make a mould for the part of the grate. Based on our findings, we followed the principle of minimum intervention and strove to combine the traditional cultural relic restoration methods with the modern restoration concepts. We used several conservation and restoration measures such as rust cleaning and repair, not only to improve the overall stability of the bronze Zeng, but also to meet display requirements and to explore its potential value as a cultural relic.