Analysed by TLC and spectrometry, the content of the total saponin in three wild species of Gynostemma on Mount Emei is found to be the highest in July and to be the lowest in the seedling stage. Among the three, the content of the total saponin in Gynostemma pentaphyllum is the highest, that in Gynostemma pubescens lower and that in Gynostemma longipes the lowest.