A sensor selection optimization algorithm is proposed for decentralized large-scale multi-target tracking network. In this method
the lower bound of mean square optimal sub-pattern assignment error between multi-target state set and its estimation is taken as optimized objective function while the rule of weighted Kullback-Leibler average (KLA) is used to fuse local multi-target densities. The coordinate descent method is proposed to compromise the computation cost and tracking accuracy. Simulations verify the effectiveness of our method under different signal-to-noise ratio scenarios.