Based on RS and GIS

the land use change and structural character were studied

and a land ecological risk index was constructed based on the land-use structure.In order to generate the map of land ecological risk evolvement rules in 1996 and 2005

the system sampling method

semi-varogram analysis and block Kriging were used to make the index a spatial variable.The results indicated that the proportion of residential and mining land increased quickly

the proportion of secondary saline habitat was much bigger

and the conflict between the producing-construction of oilfield and eco-environment conservation was keen-edged in the recent ten years;The center of ecological risk had transferred from the district of Guangrao to Dongying

the ecological risk was in the tendency of worsen

and the distribution of land ecological was imbalanced greatly

high-risk zone was the residential and mining land denseness district

mainly distributed in Dongying district which was in the mid of the city.Mid-risk zone mainly distributed in the Guangrao district and the district which had serious saline habitat land.Low-risk zone mainly distributed in Hekou district and the east of Kenli county.Finally we put forward some policy suggestions and reconstructive measures of ecological security.