The invention discloses a wear-resistant sodium silicate coating for an electric field environment and a preparation method of the coating. The coating is prepared from the following raw materials in parts by mass: 85-120 parts of liquid sodium silicate, 1-15 parts of zinc powder, 3-20 parts of an aqueous solution containing 10% of aluminum triphosphate, 5-20 parts of mica powder, 5-15 parts of nano-aluminum oxide and 10-500 parts of water. The preparation method comprises the following steps: selecting the zinc powder, the aqueous solution containing 10% of aluminum triphosphate, the mica powder and the nano-aluminum oxide in proportion according to a formula and putting the raw materials into a ball-milling tank, ball-milling for 1-2 hours at a rotating speed of 25-350rpm, and taking the raw materials for later use; then adding the raw materials for later use into liquid sodium silicate while stirring, and fully mixing and adding water; and pouring the slurry into a stirrer container, stirring at a rotating speed of 200-350rpm for 5-20 minutes, and then filtering by using a 200-mesh screen to obtain the required finished product coating. The corrosion resistance of a steel member material in the electric field environment is improved.