A simple but valuable iterative Chebyshev design method was presented. By studying the design procedure of Chebyshev band pass filters, we pointed out that it is the phase variation that results in the remarkable narrowing in the final pass band. Beginning with some larger initial values, one can arrive at satisfactory results after several simple iterations without calculating the phase property of reflective stacks. The results of adding interference orders and ripples to the iteration procedures was discussed. The design block diagrams and some actual design results were given. The basic principle of this method is to realize a direction-controlled optimization through different iterative procedures.