Constant-resistance anti-collision anchor chain

The invention discloses a constant-resistance anti-collision anchor chain. The constant-resistance anti-collision anchor chain comprises a main anchor chain, a first king-size anchor chain, a second king-size anchor chain and a mooring rope fixing anchor chain, wherein two ends of the main anchor chain are respectively connected with the first king-size anchor chain and the second king-size anchor chain; the first king-size anchor chain is connected with a first king-size ring; the first king-size ring is provided with a first bow shackle and a first end shackle; the second king-size anchor chain is connected with a second king-size ring through a large rotating ring head; the second king-size ring is provided with a second bow shackle and a second end shackle; a fracturing ring is arranged between the first bow shackle and the second bow shackle; a third bow shackle and a fourth bow shackle are respectively arranged on chain rings at two ends of the mooring rope fixing anchor chain; a chain ring on the first