Abstract: The division of reservoir flow unit is an important method in the understanding heterogeneity of reservoir、evaluateing effect of waterflood and distributing of remaining oil.In this paper,we take Panguliang areas Chang-6 formation in Jing`an oilfield as an example,we select the permeability,porosity,reservoir quality index,standardized porosity exponent and flow zone index as a unit of study area flow parameters of reservoir flow units which has been divided and discussion.The flow units in Chang-6 reservoir in Panguliang,Jing'an oilfield,it can be classified into 3 types:type A,type B and type C,with the reservoir properties and the permeability properties changing from superior to inferior.there is a good correspondence with sediment microfacies、distribution of sand body and physical property and the classification results which is able to truly and objectively reflect the geologic features of ultra-low permeability reservoir,such poor property characteristics and strong heterogeneity.The relational conclusions were obtained and rationalization proposals were put forward in order to improve the effect of reservoir development.