[Objective and method] This paper* taking the western typicai arid Koria City as the research object* aimed to anaiyze the effect of iand change in the new round iayout of the city s iand on the ecosystem service vaiue by using Costanza ecosystem service vaiue caicuiation method to amend the unit area of the iand use on the basis of the research of the existing ecosystem service vaiue parameters combined with the sensitivity anaiysis.[Result] From 2009 to 2020* cuitivated iand* orchard and other iand accounts for a iarge proportion of the totai iand. The main characteristic of iand use change is that the forest iand is increasing whiie the other iand use is decreasing. The ecosystem service vaiue of cuitivated iand , orchard and forest iand has changed a iot* and the ecosystem service vaiue of unit area is different in different regions. Areas with high ievei services vaiue were iocated in the southwestern and northwestern piains of Koria City. In these areas* the main iand use types are forest iand and grassiand. Areas with 2. 5 X 109 -3. 0 X 10 services vaiue were iocated in western and southeastern piains. The middie ievei service vaiue is aimost centraiized in the center of Koria City. Areas with iow ievei services vaiue were iocated in the northwestern piain. [ Conclusion ] During the recent ten years, the ecosystem service vaiue of Koria City wiii decrease, the main reason of which is that the increase of the residentiai iand and decrease of grass iand and unused iand. From this, it is conciuded that the iand change in the optimizing process of iand use structure must be given a dueattention to in the foiiowing ten years.
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