The invention discloses a wardrobe freshener and its preparation method, and belongs to the field of a daily chemical industry product. The wardrobe freshener is prepared from, by mass percent, 2-4% of lemon leaf, 3-6% of hairyvein agrimony, 4-7% of radix stemonae, 5-8% of wintergreen oil, 6-9% of ageratum thistle oil, 8-10% of spikenard oil, 20-22% of thickening agent, 6-8% of active carbon, and8-12% of emulsifier; the allowance is deionized water. The wardrobe freshener has good inhibiting effect to multiple bacterial and fungi, and good effect of repelling insects and removing odor; the wardrobe fresher contains multiple nature extracts, smalls gentle and clear, and is green and environment-friendly, safe and reliable.