The invention relates to a desloratadine oral dispersible film which comprises desloratadine, biologically-acceptable water-soluble polymers, plasticizers, purified water and the like, can be dispersed or dissolved quickly in the oral cavity, and is used for treating allergic rhinitis, allergic rhinitis and asthma syndrome, allergic nasal conjunctivitis, allergic dermatitis, allergic asthma and the like. The desloratadine oral dispersible film is free of irritation, convenient to take and carry, fast in effect, good in taste and particularly suitable for being used by the olds and children.