Target tracking based on the unscented particle filter(UPF) is proposed to solve the problem of particles degradation in the general particle filter algorithm.To solve the problem that the transition prior does not into account the current observation in the general particle filter,instead of using transition prior as proposal distribution,the unscented Kalman filter(UKF) is used to generate the proposal distribution,which improves the filtering effect.According to the visual deformation and scene change ca...