///Many preservation ways of organic matter exist in the muddy source rocks. The organic matters with different preservation mechanisms form the multiple organic micro-components. It is different evidently in the generating hydrocarbon time and the capacity of generating hydrocarbon, which is possible to lead to the wide interval of generating hydrocarbon in the muddy source rocks. In-depth understanding of the preservation mechanisms of organic matter, discussion of the relations of the different preservation mechanisms with each other and the relation between external sedimentary circumstance and organic matter preservation mechanisms, especially the interaction between minerals and organic matter, which are the essential and important problems to study on the organic matter in the future petroleum geology.