论述了激光告警设备角分辨力的误差源 ,认为接收电路动态范围不够 ,光学视场光阑不合适 ,接收光敏面相对光阑太大 ,窗口安装误差及在光纤耦合体制下光纤耦合方式不完善都是引起误差的主要原因 ,文中分别介绍了减少这些误差的方法 The error sources of the angular resolution of the laser warning device are discussed. It is considered that the dynamic range of the receiving circuit is not enough, the optical field diaphragm is not suitable, the receiving photosensitive surface is too large relative to the diaphragm, the window is installed error and the fiber coupling mode is not perfect under the fiber coupling system Are the main causes of error, the paper describes the ways to reduce these errors