According to the LSB algorithm is simple to achieve the characteristics of image scrambling technology combines good features in Arnold. Use change for the shadow image. LSB algorithm by the shadow image is embedded into the cover image, then LSB algorithm using images extracted from the image's shadow. The extracted text in the shadow image is designed to recover the original Arnold inverse transform. This method not only effectively hide the image without damage, as also to ensure the security of the hidden images, without injury.