Abstract: A new method of multi-focus image fusion is proposed.Firstly,by using wavelet transform method,two source images are fused to get the primary fusion image.Then,with regard to characteristics of multi-focus images,the measurement between clear and blurring one is based on the wavelet space frequency of image block.As to the clear and blurring one,the former is selected as the corresponding block of fusion image,while the part between clear part and blurring one is fused by the choice of the image using wavelet transform.The experiments show that the proposed method outperforms the common methods,and eliminates block effects.