The misxture from Lysimachia congestiflora Hemsl and Buckwheat flour dry powder was extracted in three different solutions.The chemical constituents of Lysimachia congestiflora Hemsl and Buckwheat flour were then preliminarily studied with systematical chemical pre-trial method.The results indicated that Lysimachia congestiflora Hemsl and Buckwheat flour contained phenols,alkaloid,reducing sugar,flavone,etc.To analyze the chemical constituents of the Lysimachia congestiflora Hemsl and Buckwheat flour is to provide evidence for the further development of it.