When tracking targets and multiple interfering targets enter site of the detector at the same time, even if the 2.1 decision condition is used, a large number of candidate trajectories remain, which requires the real-time infrared image processing system to provide large memory and computational overhead. This method relies too much on current **data** and ignores the use of other image sequence information. At the same time, in the process of track association, there may be several situations such as trajectory bifurcation and trajectory crossing. When multiple measuring points fall into the **data** association area of a certain trajectory, the trajectory bifurcation occurs; When a measured **data** falls within a **data** association region of multiple trajectories, the trajectory crossing will occur. When a single independent **data** point appears, a new track may occur. This process is shown in Figure 2. 