The Shenmingpu site (No. 2004.HN.X.A5) is located in Nayang city, Henan province. The site is on the south bank of Danjiang River of Shenmingpu village, Xichuan county. Excavated iron artifacts include kettles, pots, ring swords, sword, ploughshares, spades, cutters, lamps, adzes, rings, mat weights, etc. These artifacts date from the Warring States period to the Qing Dynasty,which is a long span of time. But most of the artifacts are dated to the Han Dynasty. Metallurgical analysis and Scanning Electron Microscopy with Energy Dispersive Xray Microanalysis(SEMEDS)were applied to analyze iron fragments removed from more than 14pieces of iron artifacts, including farming tools, weapons, implements, and culinary artifacts. The results show that farming tools and weapons were decarbonized during the solid stage to meet the requirements for hardness, strength, and tenacity.While cooking containers such as iron kettle and pot were cast in the same way as white iron, mottled iron and gray cast iron were cast. The findings indicated the existence of high levels of iron smelting and casting technologies during the time periods from the Warring States period to Han Dynasty in the Nanyang area.