The work aims to put forward an information encryption technology with strong robustness by embedding pseudo plaintext image into host image transmission, in order to avoid the risk of being cracked brought by the traditional algorithm directly encrypting the image information as plaintext and the encrypted image with plaintext image information. First of all, preliminary encryption of plaintext image color QR code and pseudo plaintext image should be done, then the mapping matrix between two images by addition principle was constructed, and finally the encrypted pseudo image was embedded into the carrier image based on wavelet transform and singular value decomposition. Through establishing the relationship between the QR code (as plaintext image) and the pseudo image and embedding pseudo image into host image transmission, the algorithm not only effectively avoids the risk of cracked plaintext, but also has a strong ability to resist noise, compression, clipping, rotation and other malicious attacks, which shows that the encryption algorithm is of good security and robustness.