During the extension project of UHV AC testing demonstration engineering 1 000 kV Nanyang substation, a 1 000 kV series compensation(SC) device platform is installed, of which the size, quality, installation height etc. are more higher than those of 500 kV one. The demand of platform installation with great difficulty is very high. In this paper, the 1 000 kV SC platform installation experiences of Jindongnan side are summarized, providing references for construction standardization of UHV substation.