The invention discloses a method for synchronously separating, extracting and purifying flavone, alkaloid and polyoses in lotus leaves. The method is characterized in that the lotus leaves are pretreated, added with different organic solvents and continuously leached for three times to obtain three kinds of leaching liquors of the flavone, the alkaloid and the polyoses respectively, and the three kinds of the leaching liquors are subjected to concentration, decoloration and drying treatment to obtain three kinds of products of the flavone, the alkaloid and the polyoses. The method overcomes the defects that the prior art can only extract a single component, destroys other components during the process of extracting the single component, has low extraction rate for the other components, high impurity content of extractives, and so on, gives attention to chemical properties of the flavone, the alkaloid and the polyoses, sufficiently considers mutual influence, activity and extraction rate of the extracting processes of various components and has the characteristics of high extraction rate, high purity and high utilization rate of lotus leaf resource.