[Objective] The impacts of the transformation of productive-living-ecological space on the change of ecological risks in oasis cities were analyzed to realize the coordinated development of productive-living-ecological space, in order to provide scientific basis for solving the disorder of land development, resource and environment problems caused by rapid economic development and social transformation.[Methods] Based on the vector data of productive-living-ecological space in Urumqi City during 2000, 2010 and 2018, as well as the methods of GIS spatial analysis and ground statistics analysis, the ecological risk index on grid scale was constructed to quantitatively evaluate the spatial-temporal differentiation characteristics of ecological risk in Urumqi City.[Results] ① During the study period, the area of living and productive space increased significantly, with a growth rate of 169.78%. The area of ecological production space increased gently, and the area of ecological and production ecological space decreased by 4.27% and 21.79%. The comprehensive dynamic degree of productive-living-ecological space was 0.40%, and the center of gravity shifted southward. ② During the past 20 years, the risk levels were mainly high and relative higher in the ecological space area, accounting for 92.15%, while the risk levels in other spaces were relatively low, and the risk levels in the living and productive ecological space areas incrased. ③ From 2010 to 2018, the degree of ecological risk in the region slowed down, and the change of ecological risk levels mainly declined, which was 1.95 times of the increase area. ④ The response elasticity of the ecological risk to the change of productive-living-ecological space in the study area decreased, indicating that the factors affecting ecological risk showed diversified characteristics.[Conclusion] ① During 2000-2018, the area of living production space in this region has significantly expanded with an increase of 606.99 km², mainly from the surrounding ecological space and production ecological space. ② The ecological security situation in the region tended to be improved, but it still belong to the middle and high-risk areas, which need to strengthen the management of the extremely unstable ecological space.