Anti-counterfeit printing technology of halftone images based on digital screening and direct detection technology not influenced by scanning error were studied from the perspective of digital printing and combining with digital image processing technology. A reasonable method to embed data in color halftone images with noise-balanced error diffusion (NBEDF) and directly detect the anti-counterfeit effects was proposed based on previous researches. The experimental results showed that hidden information can only be observed when the corresponding decoded image overlays the color image with hidden information. It was concluded that the anti-counterfeit method has good anti-counterfeit effect in screening print.