The invention discloses a starch and lotus leaf powder blended coating material as well as a preparation method and an application thereof. The coating material comprises starch, lotus leaf powder, humic acid and a crosslinking agent, wherein the starch accounts for 75%-85% of the total mass of the coating material, the lotus leaf powder accounts for 10%-20% of the total mass of the coating material, the humic acid accounts for 0%-10% of the total mass of the coating material and the content is not zero, and the crosslinking agent accounts for 0.2%-5.0% of the total mass of the coating material. The formulated amount of the starch, the lotus leaf powder and the humic acid is put in a reaction kettle, water is added, the mixture is stirred and mixed uniformly, heated to 60-90 DEG C and gelatinized, then the formulated amount of the crosslinking agent is added, back flow is performed at 90-100 DEG C, and the mixture has a crosslinking reaction; then stirring and cooling discharging are performed, and a starch and lotus leaf powder blended coating material contained aqueous dispersion is prepared. Controlled release fertilizer for different release stages can be prepared through adjustment of component composition of the coating material and the ratio of the coating material to granulated fertilizer. The controlled release fertilizer prepared from the coating material has the advantages that raw materials are widely sourced, low in cost and easy to obtain, and a preparation method is simple and facilitates easiness in industrial production.