The invention provides an implementation method for a WEB interface compatible with a PC terminal and a mobile phone terminal. The method comprises the steps that first, a .css cascading style file applied to the PC terminal is created; second, a .css cascading style file applied to the mobile terminal is created; third, a control name defined in a div tab in the WEB interface and property values of the control are searched for; fourth, a display style corresponding to the control name in the div tab is set in the .css cascading style files; fifth, whether a current device is a PC or a mobile device is judged in the same .html interface initialization process; and last, different .css cascading style files are loaded according to different devices, relevant property values under the .css cascading style files are loaded, and then compatible display of the WEB interface on the PC terminal and the mobile phone terminal can be realized. Through the method, interactive display on different devices becomes friendlier.