For aiming at security problems of depth video in three dimensional (3D) video s ystem,using a new carrier embedded information,an information hiding alg orithm of depth video in 3D high efficiency video coding (HEVC) based on single depth intra mode is propo sed in this paper.Firstly,a candidate list is established about the coding unit (CU) block which uses single depth intra mode for coding,and the two neighborhood pixels are compared in the candidate list.Then,in order to increa se the security of the algorithm and guarantee the quality of video,in the case of equal pixel values and unequal pixel values, the CU block embedded by the key and the prediction mode of the s ubsequent block are chosen, respectively.Finally,the index value of the pixel in the candidate list of the selected CU block are embedded according to the secret information by LSB modulation.Experimental resu lts show that the proposed algorithm provides the average embedding capacity of 244bits in a frame,the ave rage decrease values of peak signal to noise ratio (PSNR) and structural similarity (SSIM) of the rendered virt ual view image based recons tructed depth video are 1.41×10－3 dB and 6× 10－6,respectively.The bitrate of video stream increases by 0.12% on avera ge.The experimental results show that the proposed algorithm has a slight impact on the subjective perceptio n quality of 3D video and bitrate.