In Shang dynasty, the use of iron had begun. /kloc-at the end of 0/972, an iron-edged bronze cymbal was unearthed at the Shang Dynasty site in Taixi, Gaocheng, Hebei Province. This weapon has an iron blade embedded in the front of the copper blade, which is proved to be forged iron by scientific appraisal. This kind of iron is not artificially smelted, but comes from meteorites (some meteorites that fall to the ground when meteorites explode are called meteorites with more iron or pure iron). Because artificial ironmaking was not known at that time, the use of meteorites had no practical significance in social production.

Judging from the unearthed cultural relics, the unearthed ironware such as the tomb of Wu State in Chengqiao, Liuhe, Jiangsu, the Chu Tomb in Dedeshan, Changde, Hunan, and the Beixizhuang site in Houma, Shanxi are all relics of the late Spring and Autumn Period. There are iron blocks, sticks, iron, iron (qiāng, an ancient axe), iron (bó, a weeding tool), iron, iron, steel swords and so on. Some of these ironware are forged with wrought iron smelted in blocks, and some are cast with pig iron. According to underground excavation and literature records, iron farm tools have been widely used in the Spring and Autumn Period. At that time, some copper tools (such as copper hoes and shovels) and a large number of agricultural tools made of wood, stone, bone and mussels were still playing a certain role in the production field. Although the use of ironware in the Spring and Autumn Period was still in its early stage, it marked a new stage in the development level of agricultural productivity. As a new factor of productivity, ironware has created conditions for developing mountains, expanding cultivated land, developing water conservancy and transportation, and promoting social production. Since liberation, various and huge quantities of ironware in the middle of the Warring States period have been unearthed in the vast areas from Liaoning in the north, Guangdong in the south, Shandong Peninsula in the east and Sichuan in Shaanxi in the west. Fifty-eight iron farm tools, including plows, hoes, hoes, sickles, axes, etc. , unearthed in Wei Tomb of Warring States Period in Huixian County, Henan Province. Two "∨"-shaped plowshares, although not equipped with mirrors, can already break ground and row ditches. The "Warring States Iron Farm Tools" in the textbook is the iron unearthed in Huixian County. The extensive use of iron farm tools dominates the use of wooden and stone farm tools. This is convenient for cutting down trees, building water conservancy projects, reclaiming wasteland, intensive cultivation and promoting the development of agricultural production.

The history of human evolution shows that every change in production tools will inevitably lead to great changes in society. All this is true from the Stone Age to the Iron Age, to the Bronze Age, to the hand-polishing age, and then to the machine industry age, and now to the electronic information age. Moreover, the interval between major changes is getting shorter and shorter, and the intensity is getting bigger and bigger. The final result of development is that human beings are moving towards perfection and society is developing to the peak. Social changes have brought about great changes in people's position and role in society. Humans gradually liberated from the simple physical labor in the past and gradually realized the great role of thought and knowledge. The survival law of survival of the fittest further makes people develop in a more perfect direction.