The tectonic evolution and basin development of the Mesozoic in North China are characterized by stages.Accordingly

the Mesozoic Erathem can be divided into six sedi-mentary entities:1.P

2

2

-T

1

or T

1+2

;2.T

2+3

or T

3

;3.J

1+2

;4.J

3

-K

1

;5.K

2

;6.K

3

-E

1

.Most of the Meso-Cenozoic basins in North China have vertically multilayer texture;different sedimentary entities are separated by uncomformities

disconformities or para-conformities.This kind of multilayer textures

named as superimposed basins

were result-ed by the superimposition of sedimentary formations formed in different basin-forming stages.The superimposition of the basins could be divided into three types

that is intra-overlapping

lateral overlapping and drape and five styles such as composite

mosaic-like

cross

single-basin and multi-basin drapes.Hydrocarbons usually occur in complecated su-perimposed basins.Through the comparison of hydrocarbon occurrences

it is suggested that the Paleozoic-generated Mesozoic reservoirs will be the main type within three marjor basins in Xinjiang

and Erlian and Jiuxi types will be the main types in Songliao-North China

Hailar-Erlian-Badan Jaran and the Hexi corridor region for hydrocarbon exploration.