Anode graphite coating for aluminum electrolysis and preparation method thereof

The invention discloses anode graphite coating for aluminum electrolysis, comprising, by weight, 20-40 parts of powdered graphite, 1.5-1.8 parts of carboxymethyl cellulose, 0.2-0.5 part of formaldehyde, and 57.7-78.3 parts of water. As the carboxymethyl cellulose added herein is well affinitive to water, the carboxymethyl cellulose may dissolve quickly in water after being added to the water, water viscosity is improved, and the solution containing powdered graphite particles has enhanced ability to attach to the surface of an anode group claw for aluminum electrolysis; although the added powdered graphite particles that are uniform are highly hydrophobic, the particles are avoided quickly settling to the bottom of the solution after addition due to the wrapping action of the carboxymethyl cellulose in the solution, and time for the powdered graphite particles to suspend in the solution is greatly extended; the coating thickness of the powdered graphite is increased, the powdered graphite particles tend to cl