The invention discloses an implementation method of a petrochemical pipe anti-corrosion insulating layer. The method comprises following steps that firstly, steel pipe surface pretreatment; secondly,defect repairing and sand blasting of structures like a welding line; thirdly, insulating layer laying; fourthly, anti-corrosion layer spraying; fifthly, operation of repeated spraying for two to three times. Liquid rubber spraying paint has the good mechanical property and anti-aging performance; the coating can perfectly wrap substrates, coating is achieved, the substrates are in seamless connection, opening, stripping and falling are avoided, the good protection effect on a base layer is achieved, and a bend, a connector, a valve and other special structures or base layer can be constructedmore simply, conveniently and reliably; in the spraying process, the construction is convenient, efficiency is high, after spraying, instant forming is achieved, and through one-time rapid hardening,a firm is formed. The excellent chemical corrosion resistance is achieved, acid, alkali, salt and chlorine can be resisted, and the method is particularly suitable for anti-corrosion heat preservation of a petrochemical pipe. The pipe anti-corrosion quality is improved, the pipe service life is prolonged, and the safety production is ensured.