The invention discloses a manufacturing method of composite oil dispersible powder. The method comprises steps that: step 1, an embedding material is prepared, wherein porous starch, corn starch and maltodextrin are uniformly mixed according to a weight ratio of (1-3):(3-5):(5-8); the mixture is packaged, and is preserved for later use; step 2, composite oil is prepared, wherein prepared walnut oil and extracted rice bran oil are mixed according to a weight ratio of (1-2):(2-5); the mixture is preserved in a storing tank; step 3, the composite oil powder is prepared, wherein the composite oil is weighed; a certain amount of the embedding material is added to the composite oil, such that a mass percentage concentration of the embedding material reaches 20-50%; the mixture is well mixed, and is instantly subject to spray drying by using a spray drying machine, such that the composite oil dispersible powder is obtained. According to the invention, the composite oil is manufactured into dispersible powder, such that product characteristics such as nutritive value and flavor of the product are changed, and a market requirement is satisfied. Also, the chemical stability of the embedded composite oil is substantially improved, such that the product is east to store and transport.