The invention provides a composite coating heat-insulating corrosion-resistant oil pipe. A basic body of the heat-insulating oil pipe is a metal oil pipe, the inner surface of the metal oil pipe is coated with an inner aerogel coating, and the outer surface of the metal oil pipe is coated with an outer corrosion-resistant aerogel coating. Due to the fact that the heat conductivity coefficient of the aerogel coatings is low, heat conduction and heat convection between crude oil and the borehole wall are almost stopped; and by the adoption of the inner wall coating and the outer wall coating, the heat insulating effect is more remarkable. The crude oil keeps flowing higher than the wax precipitation temperature point before flowing out of a wellhead, so that wax crystal precipitation is restrained, and the wax prevention effect is achieved. Meanwhile, an anticorrosive material is added to the outer coating, so that the outer wall of the oil pipe is prevented from being corroded by produced high-salinity fluid.