An anti-counterfeiting information embedding and extracting method based on halftone image was discussed, which used the principle of dot generation and database technology to realize embedding the hidden information into the generated halftone image files after RIP processing. CCD scanning equipment was used to scan the print with the hidden information and extraction of the hidden information was realized using algorithm. The experimental results showed that the combination of database technology greatly improves the hidden information content flexibility, and this method has high speed in embedding and extracting information; the method doesn't need additional printing cost; the embedded information is invisible. It was concluded that the method can be widely used in packaging and certificate anti-counterfeiting field.