The invention discloses a processing technology of an improved type 1 slow-release long-acting superhydrophobic anti-pollution flashover coating. The processing technology comprises the following steps of firstly, preparing hydroxypropyl-terminated fluorine-containing polysiloxane, hydrogen-terminated polysiloxane and hydrophobic gas phase white black carbon; adding the hydroxypropyl-terminated fluorine-containing polysiloxane, the hydrogen-terminated polysiloxane, silicone rubber 107, nanometer zinc oxide, oil amino oleate, nanometer calcium carbonate, decabromodiphenyl ether and talcum powder into a mixer, uniformly stirring, and grinding on a three-roll machine for 3 to 4 times, so as to obtain a uniform glue; then, adding the uniform glue into a kneading machine, adding the hydrophobic gas phase white black carbon, heating to 145 to 150 DEG C, kneading for 1 to 2h, cooling to 20 to 30 DEG C, adding a ketoxime type crosslinking agent, a silane coupling agent and an organic solvent, and uniformly stirring, so as to obtain the slow-release long-acting superhydrophobic anti-pollution flashover coating. The slow-release long-acting superhydrophobic anti-pollution flashover coating prepared by the processing technology has the advantages that by combining the hydroxypropyl-terminated fluorine-containing polysiloxane and the hydrogen-terminated polysiloxane, the purposes of slow release and pollution flashover prevention are realized; the hydrophobicity transfer of the coating is obviously improved.