The invention discloses antistatic spinning slurry and a preparation method thereof, wherein the antistatic spinning slurry is prepared from the following raw materials in parts by weight: 60-70 partsof acrylonitrile fiber, 10-15 parts of silicon dioxide, 30-40 parts of polyethylene glycol, 12-16 parts of mannitol, 8-12 parts of vinylidene chloride, 5-8 parts of carboxymethyl cellulose, 3-5 partsof epoxy polysilane acrylate, 2-3 parts of N-dodecyl-N,N-dimethylglycine, 1-2 parts of nano silicate, 5-6 parts of fatty alcohol-polyoxyethylene ether, 10-15 parts of vegetable oil, 1-3 parts of a thickening agent and 0.5-0.7 part of a preservative. The fabric prepared from the antistatic spinning slurry has good mechanical strength, toughness and wear resistance, has good antistatic performance,and is simple in preparation method and easy to industrially produce.