The sedimentary features of Liaohe Depression are characterized by the small-scale sand body, multi-provenance, multi-sedimentary systems and low degree of sandstone maturity. Analysis on the diagenesis and diagenetic facies show that the reservoir diagenetic facies in Liaohe Depression can be divided into four types, i.e. carbornate cemented facies, autogenetic clay mineral cemented facies, quartz cemented facies, and clay mineral transformed facies. These facies can further be divided into the following seven subfacies, i.e. the clay authigenetic film cemented facies, crystal granular carbonate cemented facies, authigenetic kaolinite cemented facies, quartz cement facies, poikilitic carbonate cemented facies, illite and montmorillonite mixed layer facies and illite facies. The distribution of these facies are obviously controlled by their depths, and is characterized by a vertical connection，which can constitute six diagenetic zones. Six high porosity-permeability bands (ABCDEF) and six low porosity-permeability bands (abcdef) are established by a great deal of statistic analysis on sandstone and mudstone porosity and permeability. They correspond respectively to six diagenetic facies zones, i.e.: band A－a、band B－b、band C－c、band D－d、band E－e、band F－f respectively correspond to the crystal carbonate facies band, authigenetic kaolinite facies band, quartz cemented band,poikilitic carbonate cemented facies band,illite and montmorillonite mixed layer facies band and the illite facies band. Different diagenetic facies bands in the sand reservoir correspond to the different evolutions of different porosity development bands, and the relationship between them can be illustrated by the viewpoint of organic evolution. A satisfactory effect has been obtained by using the above regulation in the prediction of favorable reservoir pores in Yuanyanggou area. As a result, the effect of reservoir pores evolution on oil and gas migration has been proved in the area.