Fireproof insulating powder coating as well as preparation method and application thereof

The invention discloses a fireproof insulating powder coating as well as a preparation method and application thereof, and belongs to the technical field of coatings. The fireproof insulating powder coating provided by the invention is prepared from the following raw materials in parts by mass: 50 to 250 parts of organic silicon modified epoxy resin, 50 to 250 parts of epoxy resin, 1 to 60 parts of curing agent, 1 to 20 parts of accelerant, 100 to 300 parts of filler and 50 to 350 parts of auxiliary agent, the curing agent comprises a modified dicyandiamide curing agent; the modified dicyandiamide curing agent contains at least one of aryl, amino or epoxy group. The modified dicyandiamide curing agent disclosed by the invention has excellent flame-retardant and temperature-resistant performance, has good curing reaction activity with epoxy resin, and is beneficial to improving the fireproof and temperature-resistant performance of the coating; meanwhile, the powder coating with excellent fireproof and insulat