Special base of three point support formula ficus pumila for the firm fixed of experimental arrester is treated in the realization, avoids the emergence of potential safety hazard. It includes insulating disc and landing leg, is equipped with the arrester mounting hole at the upper surface of insulating disc, is equipped with the folding groove of landing leg in the bottom surface of insulating disc, is equipped with the nut standing groove in landing leg folding groove, hold in the nut standing groove have with arrester tip bolt complex nut, being equipped with a plurality of landing leg activity chamber on groove outlying insulating disc bottom surface is folded to the landing leg, articulating in each landing leg activity chamber and install the landing leg, detachable is provided with first bolt between each landing leg and insulating disc, mobilizable extension rod that is provided with in the inner chamber of each landing leg is equipped with the second bolt at the extension rod with corresponding between the landing leg. This base can be realized fixing the firm of arrester to can fold convenient transport.