The invention discloses an orchid-fragrance solid air fresher. The orchid-fragrance solid air fresher is prepared from raw materials in parts by weight as follows: 15-25 parts of orchid essential oil, 5-15 parts of sodium alginate, 5-15 parts of stearic acid, 6-10 parts of an emulsifier, 2-5 parts of propylene glycol, 1-3 parts of a surfactant, 0.05-0.1 parts of gardenia yellow pigment and 15-25 parts of deionized water. The invention further discloses a preparation method of the orchid-fragrance solid air fresher. The preparation method comprises steps as follows: extraction of the orchid essential oil, blending of the orchid essential oil, liquid decoction, primary heating extrusion, cooling and crushing, secondary heating extrusion and material forming. Fragrances of paphiopedilum, Spring orchid, four-season orchid and cymbidium kanran are blended into the solid air fresher, and the natural, non-toxic and environment-friendly solid air fresher is processed and researched with a physical processing method. The orchid-fragrance solid air fresher has the efficacy of soothing the mood, clearing away heart-fire, refreshing, renewing the energy and the like and is worth promotion.