Abstract: ArcGIS model builder is an application program used to create,edit and manage spatial analysis models.It is a visual programming environment.¹It is a visual programming language used to build geographic processing workflow,automate and record spatial analysis and data management processes.According to the characteristics of large amount of data,serious cross overlap of vector data,long time-consuming and error prone data spatial analysis involved in the integration and optimization of nature reserves,this paper creates a geographic processing model in model builder,combines a series of processes and geographic processing tools in series into a workflow,and realizes multi-step automatic execution and spatial data processing under the same instruction of ArcGIS software.It can effectively reduce the time cost of manual operation,so as to greatly improve the efficiency of data processing in the integration and optimization of nature reserves.