The tracking of the maneuvering spatial target was studied.A maneuvering spatial target tracking model applying bearing-only measurements was proposed with consideration of the influence of J2 perturbation and the system state model of the maneuvering target.The square-root version of the Cubature Kalman Filter (SCKF) was introduced for target tracking.According to the different maneuvering modes of the target the estimation accuracy of SCKF under different way of maneuvering was analyzed through computer simulation.The simulation result show that when the maneuverability of target is the same, coplanar orbital maneuvering is more easily to make the filter diffuse than non-coplanar orbital maneuvering.Comparison of four maneuvering modes show that SCKF is most sensitive to transverse maneuvering and the maneuvering along the path between detector and target is most likely to be tracked stably again.