The invention relates to a method for information transmission based on JPEG2000 compressed code stream. According to the method, information can be embedded into different compressed data (compressed at different ratios) of images without increasing the amount of data, change the JPEG2000 compression format or affect normal decompression. A receiving end can recover information as well as carrier images. Under the condition of not increasing channel resources, the amount of data transmitted is increased, and the transmission efficiency of a data transmission system is improved. By using the method, the ratio of the amount of hidden information in a compressed domain to the total amount of data in the compressed domain can reach a desired ratio, such as 1/16, 1/8, 1/4, and 1/2. If data is compressed four times, the ratio of the amount of hidden information to the amount of original data is 1/64, 1/32, 1/16 or 1/8. Moreover, information data can be recovered normally. The peak signal-to-noise ratio of a carrier image to an original image is over 30 dB. The PSNR loss ranges from 1 dB to a plurality of dBs. Normal use of images is not affected.