The present invention relates to an object area analysis mechanism. The object area analysis mechanism comprises: an area extraction device arranged in a mobile phone casing, for detecting respectiveareas occupied on the mobile phone screen by respective icons of respective applications on a current mobile phone screen, and performing average calculation on each area to obtain an area reference value; and an icon control device connected with the area extraction device, for matching the face sub-image shape with each preset reference face shape of each user. The object area analysis mechanismprovided by the present invention is dynamic, flexible and convenient to use; and the face shape of the current mobile phone user is detected to obtain the area of the idiomatic icon corresponding tothe user, and when the area of the icon is not matched with the average of the area of each icon on the mobile phone screen, the real-time adjustment of the icon area is performed, so that the user experience of using the mobile phone is improved.