The present invention discloses a method for extraction and preparation of curcumin, and in particular relates to the technical field of preparation of curcumin, which comprises the following steps: S1S9. For the present invention, the preparation process is simple, in which the curcumin can be fully utilized, the waste of raw materials can be minimized, and the nutritional elements of curcumin may be enriched to enhance its efficacy safely without toxic or side effect.