As a network link for information transmission and information sharing,the tactical data link can maximize the effectiveness of the tactical system and improve the operational effectiveness of the weapon platform.This paper studies fusion tracking based on data-link and airborne multiple sensors.According to the characteristics of data-link,radar and photoelectric sensor,the time is firstly registered by using filter extrapolation algorithm,and the centralized expanded-dimension fusion algorithm is used to implement target fusion tracking.Simulation is made for comparing the fusion filtering with separate data-link filtering and separate radar filtering.The results show that the fusion algorithm based on data-link and airborne multiple sensors have a better effect on target tracking.