Calcium lignosulfonate is a kind of multi-component polymer anionic surfactant. It is brown-yellow powder with a slight aroma. Its molecular weight is generally between 800-10000. It has strong dispersibility, cohesiveness and chelating property. It is widely used as cement water reducer, refractory binder, ceramic body reinforcer, coal water slurry dispersant, pesticide suspension agent, leather tanning agent, carbon black granulator, etc.