Abstract: An improved image hidding method is proposed based on chaotic sequence and bit operation.Firstly，chaotic sequences are generated based on logisitc mapping and applied to pre-encrypt the image，including improved magic-cube scrambling and pixels permutation；then further processing are used to hide the pre-encrypted image based on bit operation.The effect of hidding is also analyzed by using the method of accessing.Simulation results indicate that the method has good efficiency and security characteristic.