Abstract: Some of the chaotic algorithms as of the Lorenz,Duffing and so on are too simple in structure and have inadequate parameters,so applied to information encryption is easy to be decrypted.By mixing the Lorenz chaotic algorithm with the Duffing chaotic algorithm,a new multi -parameter six -dimensional chaotic algorithm with a more complex structure is proposed in this paper.Combined with Arnold mapping applied in color image encryption area,the simulation results show that the new algorithm thus created is very effective.