The invention discloses a purely-natural botanical scented ornament and a preparation method thereof. The purely-natural botanical scented ornament is composed of the following components by weight: 70 to 90% of rose, 5 to 10% of mint, 2 to 8% of lavender and 3 to 10% of wormwood. The preparation method for the scented ornament comprises the following steps: (1) separately carrying out microwave sterilization on rose, mint, lavender and wormwood; and (2) putting the sterilized rose, mint, lavender and wormwood into a ventilating packaging bag so as to prepare the scented ornament. The scented ornament has long-lasting and stable fragrance and insect-repelling and insect-preventing effects; disinfection of the scented ornament is more thorough and the original color of perfume can be maintained through microwave sterilization, while bacteria and eggs cannot be removed through natural air-drying in the prior art.