Transition‐metal‐catalyzed C–H activation and C–C formation have been receiving considerable attention because of their high atom economy and synthesis efficiency. Iron is widely used in catalytic reactions because it has the advantages of abundance, low cost, accessibility, and environmental friendliness. In recent years, research on the Fe‐catalyzed C–H activation of C–C formation has made considerable progress. This paper summarizes latest studies on iron‐catalyzed C–H activation, classifies the catalysts according to the different valence states of iron, and expounds the catalytic mechanism.