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In order to cope with the problem that reversible data hiding in encrypted images(RDHEI) has lower embedding capacity, this paper proposed a high-capacity RDHEI method based on prediction error dual coding. Firstly, to reserve space for secret data, the image owner preprocessed the image using prediction error-based Huffman coding and extended run-length coding, and then encrypted the image. The data hider embedded secret data in the encrypted image. The receiver could extract the secret data accurately according to the data hiding key and recover the image losslessly according to the decryption key, it separated data extraction and image decryption. The experimental results demonstrate that the embedding capacity is effectively improved by prediction error dual coding. [ABSTRACT FROM AUTHOR]