The marine anchor chain is divided according to its manufacturing method, such as cast steel anchor chain, electric welding anchor chain and forged anchor chain. The cast steel marine anchor chain has high strength, good rigidity, small deformation, wear resistance, the cross-bar is not easy to loose, has a long service life, and is suitable for mass production. The disadvantage is that the process is complicated, the cost is high, and the impact resistance is poor. The electric welding marine anchor chain is made by bending and welding with the round steel material that meets the requirements, and has the advantages of advanced production technology, simple, low cost and good quality. The forged anchor chain has good impact toughness, but the manufacturing process is complicated, the cost is high, and the quality is unstable.