Abstract: The present invention relates to a film-forming composition suitable for hard capsules, and a preparation method thereof. More particularly, the invention relates to a film-forming composition for hard capsules, comprising 7-12% by weight of starch, 1-6% by weight of a plasticizer, 0.7-3% by weight of a gelling agent, and 79-91.3% by weight of water, and a preparation method thereof. Also, the invention relates to films and hard capsules comprising the composition. The inventive composition, and the hard capsules and films comprising the same, will be useful in various industrial fields, including pharmaceutical field and food field.