Along with the increasing flights at the Beijing Capital International Airport in recent years, the probability of encountering wind shear has greatly increased. Until now, there is no effective method for wind shear early warning. Wind LIDAR can quickly scan a wind field in three dimensions, and its measurement range is 45 to 4000 m. The LIDAR of the Beijing Capital International Airport is installed next to the west runway, and it adopts the glide path scanning mode which can capture the wind field of the aircraft’s takeoff and landing areas in three dimensions. In this paper, the realtime detection data is interpolated, and the data in the area passed by the aircrafts during the descent are selected to form the glide path headwind profile, and the wind shear detection algorithm is used to detect the wind shear from the headwind profile. Then the location and the time when wind shear happens are obtained and identified.In this paper, the wind shear reports provided by the flight crew are used to verify the research results. The verified results show that the method can detect wind shear on the path of the aircraft glide path, and the warning rate reaches 73.33%. The research proves that Lidar can detect and identify wind shear effectively.