Surface scaling behavior is one of the important factors affecting oil production in offshore oil fields. The work aims to design and develop a super-anti-scaling composite paint which can be sprayed on a large scale to solve this issue. The composite paint of super hydrophobic property was prepared by two-step spraying method with superhydrophobic silica nano-powder, silica micro-powder, butyl acetate and acrylic resin as the main raw materials. The wettability, wear resistance, self-cleaning and anti-scaling effects of the coating were evaluated by means of contact angle instrument, time-lapse photography, and boiling water evaporation scaling test. The field emission scanning electron microscope and stereomicroscope were used to characterize the morphology. After the composite paint was sprayed on the surface of N80 steel sheet, the contact angle of the composite coating was greater than 150° and the rolling angle was less than 10° in hot water at 95 ℃. After 70 circles of sanding or 10 h of water flushing test, the contact angle was greater than 150°, indicating that the surface still retains excellent hydrophobic performance. The boiling water evaporation scaling test showed that the composite coating had no obvious scaling phenomenon on the surface after boiling water scaling test for 50 h compared with the untreated N80 steel sheet, still maintains excellent superhydrophobic property, and the scale inhibition rate was up to 98.00%. After soaking in aqua regis for 60 min and 1 mol/L sodium hydroxide solution for 12 h, the contact angle was greater than 150°, indicating that the surface had excellent chemical corrosion resistance. The hot water super-repellant coating is obtained by spraying super-anti-scaling composite paint on N80 steel sheet, which have excellent hydrophobic thermal stability, high temperature stability and anti-water flushing property. It can effectively protect the base surface and greatly enhance the anti-scaling and anti-corrosion properties of the surface, providing a new idea for anti-scale of offshore oilfields wellbore.