在传统的信息隐藏算法中，嵌入率和图像视觉质量是互相制约的，因而无法平衡两者之间的关系。为此，提出了一种将可逆信息隐藏算法和不可逆信息隐藏算法相结合的高保真算法。利用不可逆信息隐藏算法的高嵌入率和可逆信息隐藏算法在图像视觉质量方面的高峰值信噪比（peak signal-to-noise ratio，PSNR），在失真较小的情况下实现隐藏更多的秘密信息。此外，该算法还能根据具体的应用场景找到相对最优的嵌入率、恢复图像的PSNR和含密图像的PSNR的平衡点，从而适应不同的应用需求。实验结果表明，与现有的其他算法相比，该算法具有更高的嵌入容量和更好的图像视觉质量。“,”In traditional information hiding algorithms, embedding rate and image visual quality are mutually restricted, so the relationship between them cannot be balanced. Therefore, in this paper, a high fidelity scheme combining reversible information hiding method and irreversible information hiding method is proposed, which takes advantage of the high embedding rate of the irreversible information hiding method and the high peak signal-to-noise ratio (PSNR) of the reversible information hiding method in the aspect of image visual quality, so as to embed more secret information with less distortion. In addition, the scheme can also find the relative optimal embedding rate, the balance point between the restored image PSNR and the PSNR containing the dense image according to the specific application scene, so as to adapt to different application requirements. Experimental results show that the proposed scheme has higher embedding capacity and better image visual quality than the existing schemes.