In this paper, pure angle measurement and location of double theodolite was studied. Considering the non-linearity of measurement equation, unscented Kalman filter (UKF) was used to estimate the system state. Assuming that the target had strong maneuvering, this paper applied the current statistical model (CSM) to fit the target motion state. At the same time, based on the background of non-cooperative target early-warning and tracking, the CSM_UKF tracking model of double theodolite against strongly maneuvering target was established. Under the same conditions, the simulation was compared with the CA model. The simulation results show that the model can track the target stably under the condition of pure angle measurement by double theodolite, especially under the condition of strong maneuvering target, the tracking effect is better than that of the CA model.