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To ensure the safe transmission of image information in communication,and improve the security performance of image encryption algorithm,we proposed a color image encryption algorithm with higher se-curity based on chaotic system.Firstly,the 2-dimensional Cubic ICMIC modulation map(2D-CIMM)is designed,which has simple form,easy to construct,and high Spectral Entropy(SE)complexity.Secondly,the hash values of the original image are used to update the initial values of the 2D-CIMM map in real time,which increases the sensitivity of the image encryption algorithm to the plaintext and improves the finite precision effect.Fi-nally,the permutation and diffusion processes of the encryption algorithm based on bit-level are performed.In addition,simulation and performance analysis show that the proposed algorithm has higher security.