A new phase quantization method of a phase hologram based on conventional random-phase encoding technique is proposed.The value consisted of multi-phase information of the phase hologram is mapped into a binary matrix by decimal-binary conversion.The binary matrix is encoded and printed as the 2-D anti-counterfeit label.As a result,the technique not only realizes the automatic input of text information,but also enhances the peak signal-tonoise ratio(PSNR) of the decoded image.Computer simulations and optical scanning experiments show that the presented technique has advantages of the simple authentication process,high PSNR,inexpensive cost and good security.