The invention discloses a pure natural plant essential oil air freshener which comprises the following main components of plant essential oil and a solvent, wherein the plant essential oil mainly comprises the following components: eucalyptus oil, lavender oil, lemon oil, rosemary oil, and geranium oil, and the solvent mainly comprises the following components: Tween 80, ethanol and deionized water. According to the invention, 1. pure natural plant essential oil is the effective component, and is healthy and environment-friendly; 2. the fragrance is natural, and the smell is pleasant; 3. the contained active components such as ketone, aldehyde and the like can rapidly capture and effectively decompose stink molecules, remove peculiar smell, and cause no secondary pollution; 4. the bactericidal and bacteriostatic efficacy is significant, and air can be purified; 5. the efficacy of emotion calming, body and mind balancing, and health care is significant; 6. the application modes are diverse, and both mist spraying and fumigation can be performed; 7. the application space can be relatively closed space, such as rooms, hotels, public entertainment places, various types of compartments, and the like.