The algorithm for Iris recognition based on Gabor transform is difficult to choose Gabor parameters. A method for parameters selection in Gabor filter which used in iris recognition is proposed. In this method, the position parameters can be selected according to partitions of image, the size parameters can be chosen by the curve of hamming distance; and the frequency parameters can be gotten based on the proportion to size parameters. With the Gabor filters designed by the method to iris feature extraction, experimental results show that it can extract effectively the characteristics of iris texture for iris recognition and has high accuracy.