In this paper, a sort of nonlinear bilevel mixed integer\|programming problem is discussed. It is established on nonlinear bilevel mixed integer\|programming basis of theory and algorithm in nonlinear mixed integer\|programming. We approached the algorithm solving mixture integer\|programming with simulated annealing algorithm for upper\|level programming, and applied interior penalty function method for lower\|level. It is evidenced this algorithm is effectual in operation actually.