Earth Observation data sharing plays fundamental role for earth science research

which is an important part in the EO data lifecycle. Affected by the changing of data sharing ecosystem with resource provider/consumer/processor relationship

the sharing mechanism is presenting itself in sequential phases of rear-sharing

project-sharing

department-sharing and public-sharing. Information technologies have always driving the changing of scientific agenda of data sharing

which now can be understood as data open

data sharing and data link.Open of data means the condition of accessible via network

sharing of data means authorized method to reuse data

and link of data means scientific cross-understanding and cooperation of different data resources. Comparing with the evolution history of data sharing policy in USA

China needs to improve its sharing mechanism to be multi-win and sustainable by a dynamic adjusted data sharing socio-ecosystem.The present technical framework of earth observation data sharing is built up with implementation components of data open

data sharing

data publication and data citation

and so on. Under the revolution on cultural

political

technical and application factors for earth observation data sharing

the Next Generation EO Data Infrastructure based on deeply and widely sharing is becoming a reality. The new technical trends of earth observation data sharing as Globalization

cross-disciplinary

standardization

facility-oriented

big-data and public-engagement

will heavily change the related scientific activities in near future.