The invention discloses a preparation method of an aroma enhancement aid for filling and application of the aroma enhancement aid in cigarettes. The preparation method includes: adding a wall material of 0.1-30% according to mass percent into distilled water, heating, and stirring to obtain a wall material solution; slowly adding an aroma enhancement substance of 1-50% in mass percent equivalent to the wall material into the wall material solution, stirring at 50 DEG C and 500-2000r/min for 4h, and including the aroma enhancement substance into a cavity of the wall material to obtain an inclusion solution; spray-drying the inclusion solution to obtain the aroma enhancement aid. The aroma enhancement aid is prepared by embedding the aroma enhancement substance, so that the preparation method is simple in production process and easy to popularize. The aroma enhancement aid is applied in the cigarettes in a filling form, so that volatility of the aroma enhancement substance can be lowered, concentration at both the front ends and the rear ends of the cigarettes during smoking is uniform, and smoking quality of the cigarettes is improved.