Abstract: Based on the distributed multi-sensor track fusion system，under the rule of minimizing the trace of estimation error covariance matrix，it applies both sequence disposal means and matrix weighting fusion algorithm，the track fusion algorithm，on the condition of considering the correlated estimation，is presented.Also，the analysis and the simulation of the track fusion performance of the algorithm are presented，theoretically.The simulation results show the feasibility and the validity of the fusion algorithm based on sequence disposal.