Nano-iron oxide (α-Fe2O3) is chemically stable, environmentally friendly, low-cost, and narrow band gap, which makes it an ideal visible-light catalyst. The article introduces the research progress of different preparation methods of α-Fe2O3, especially some special structures. The effects of different dopants and enhancement mechanism of photocatalytic performance for degradation of organic pollutants are emphatically analyzed. Also, the development trends and application prospection of doped α-Fe2O3 are summarized.