Netted radar data fusion processing has the characteristics of wide application scenes, adopting diverse algorithms and using controllable parameters. Aiming at the problems of long development cycle and high system design complexity existing in the development of traditional fusion processing system, based on the component design of fusion processing, a general template of network fusion processing is designed by using open and reconfigurable architecture. Because of the low coupling of components, the system can be expanded easily only by modifying some components instead of building a whole system. The expanded contents include new component algorithms and new fusion templates. Compared with reconstructing the whole system, the independent and easy-to-understand component expansion operation reduces the complexity of the system and the ability requirements for developers. Simulation experiments have achieved two types of expansion. The results show that the design is feasible, improves the integration efficiency of the new algorithm, and enhances the scene adaptability of the networked fusion processing system.