Abstract: The microfluorometric analysis of soluble organic matter from four standard samples and four modern organism and natural section samples in this paper shows that heax moves towards the long-wave direction with the increase of aromatic ring numbers in the fluorescence of standard samples. The spectrum peaks of pIant plankton, Ulva and other hydrobios are in the blue area, and those of Sargassum and other genobenthos are in the red area. By meang of the correlation diagram of chloroform "A"λ Anax to kerogen sapropels combined with the difference of promal organic mater, the types of source rock can be classified.