Abstract:By means of HPLC method, yunaconitine and talatisamine contained in 10 samples of folk drug Caowu (aconite) have been analysed. The result shows that in 3 species both yunaconitine and talalisamine are present, and in 7 species only yunaconitine is found. The contents and HPLC chromatograms of these alkaloids vary with the samples.