Original structure in optics multilayer is a key to the optimization design of multilayer. Take four filters including band-pass filter and cut-off filter within 1200-1600 nm band, cut-off filter within 600-1000 nm band and cut-off filter within 400-800 nm band as optimization objects, and talk the different between theoretical reflectivity and practical reflectivity as target functions. Simulation program based on ant colony algorithms and MATLAB is programmed and implemented, and the simulation results show that the algorithms are ...