Abstract: Based on the clonal selection theory the main mechanisms of clone used in the field of artificial intelligence are analyzed in this paper An improved evolutionary strategies algorithm, immunity poly clonal strategy algorithm （IPSA）, is put forward Compared with the classical evolutionary strategies （CES）, IPSA is shown to be an evolutionary strategy capable of solving complex machine learning tasks, like multi objective optimization, and the results are better Using the theories of Markov chain, it is proved that IPSA is convergent