In order to build a simulation system of fixed-wing aircraft on-call antisubmarine and offer the rapid and correct on-call antisubmarine project, United Modeling Language (UML) is used for building conceptual models of fixed-wing aircraft’s on-call antisubmarine. Entity and mission list of on-call antisubmarine is listed, mission model of attacking submarine, action model of eluding torpedo and communication model of fixed-wing aircraft are built, activities of on-call submarine search are described. The research lays the foundation for simulation of fixed-wing aircraft on-call antisubmarine, and people in different fields such as military and simulation reach an agreement in understanding of the simulation of fixed-wing aircraft on-call antisubmarine.