The invention discloses a face focusing method suitable for an image capturing device. The method comprises the following steps of: firstly, capturing focusing images at a plurality of focal distance positions in a predetermined focusing focal section respectively; secondly, detecting the focusing images respectively and positioning human face blocks; thirdly, partitioning each human face block into a plurality of sub-blocks; fourthly, solving an optimal focusing focal distance (also called sub-block focal distance) of each sub-block in an approach line mode; fifthly, grouping the sub-block focal distances to obtain a neighboring group; and lastly, determining a target focal distance according to the sub-block focal distance of the neighboring group. By adopting the target focal distance obtained in the way, distance measurement can be performed on a human face more accurately and the influences of non-human-face (such as background) images in the human face blocks are eliminated.