Abstract: Zenith blind zone is a phenomenon that the line of sight cannot track the target when the target maneuvers nearby the twoaxis turntable singular point. Firstly, the principle of the singular is explained in mathematical and physical ways. Secondly, the strategy of avoiding the turntable singular point and particular ways are expounded based on autonomous attitude path planning under the restriction of engineering. Thirdly, the hypothesis of the strategy is modeled and the error is estimated. Finally, the strategy is proved to be suitable for engineering application as expected by simulation.