Phosphorus catalysts play an important role in organic synthesis, especially in some special reactions, where they show excellent catalytic performance. Phosphorus catalysts are usually used in a variety of chemical reactions, such as nucleophilic substitution reactions, olefin polymerization reactions, and catalytic hydrogenation reactions. Phosphorus catalysts have a wide range of applications and can provide important assistance in asymmetric synthesis, polymerization reactions, and reaction selectivity control. They are particularly suitable for complex molecular synthesis and environmentally friendly catalytic reactions.