The invention discloses an environment-friendly non-inflammable uniform air freshener which uses dimethyl ether as a propellant and is prepared from the following raw materials in parts by weight: 1.0-3.0 parts of essence, 0.1-0.5 parts of cosmetic preservative, 15-20 parts of coconut oil, 20-25 parts of distilled water, 10-15 parts of ferrous sulfate, 8-10 parts of malic acid, 0.5-1 part of chlorophyll, 10-15 parts of ethanol, and 20-30 parts of dimethyl ether. The air freshener disclosed by the invention can be used for removing indoor unpleasant odor, adsorbing unpleasant odor particles, carrying out chemical reaction with the unpleasant odor particles, and masking unpleasant odor by using aromatic substances, has good deodorizing effect, generates faint scent odor, is environment-friendly, safe and non-inflammable, and does not need shaking. The content of the air freshener can be ejected all the time without inflammation by directly opening (pressing) a switch, and is non-inflammable when being sprayed to a source of ignition to put out the source of ignition.