The geometry parameterization methods of unmanned aerial vehicle (UAV) were investigated in this paper. In conceptual design phrase, the parameterization modeling of UAV configuration was achieved by making use of the API functions of the CATIA software, which established the relationship of geometry parameters and attributes of UAV. When the geometry parameters changed, the corresponding geometry model updated automatically. The efficiency of modeling was improved by using the drive relationship of design variables and geometry model of UAV. The constructed parameterization model was validated by the UAV applications, and can generate UAV geometry configuration quickly.