Abstract: In order to explore the influence of the form of the link button in the navigation interface on user's cognition and performance, in this paper, based on the analysis of the existing site navigation interface, the eye-movement data of visual search in the site navigation interface are obtained through eye-tracking technology and divided into four levels according to the degree of fixation. The eye-movement data together with two design elements(colors and icons) of the site link button are factored as the coding element to test the user's performance on the navigation prototype. The results show that the location of the link and the existence of the icons have a significant impact on the search performance of the link button, and a higher level of fixation and an icon can facilitate the search performance. In consideration of the influence of the different coding forms of the link button on the search performance of the web site navigation interface, a more distinguished link button arrangement can be used in site navigation interface design to improve the usability of the interface.