Camellia is one of standard block ciphers algorithms published in 2003 by the NESSIE project.We analyze differential iterative characteristics and linear iterative characteristics

and find how the permutation and its inverse permutation affect 3-round and 4-round iterative characteristics

and the best 3-round and 4-round differential and linear iterative characteristics are found by us.Usingthe best 4-round iterative characteristics

we construct r-round differential and linear characteristics of Camellia variant.The differential probability of the 18th round is 2

-296

and the linear bias is 2

-141.32

.These results are better than the results given by Eli Biham in 2001.