Abstract: In order to evaluate the relationship between detection efficiency and meteorological elements in different scanning modes of coherent wind light detection and ranging(LiDAR), the detection data of coherent wind LiDAR at Guanghan Airport from August 2020 to July 2021 were used for analysis and verification. The results show that the detection efficiency decreases linearly after the detection range is larger than 3 km under plane position indicator scanning mode; When scanning at 90°, the detection efficiency decreases linearly after 500 m; The overall detection efficiency was highest in November, lowest in July, and decreased from November to following year in July, and increased from July to November; The detection efficiency is low from sunset to sunrise, and the detection efficiency is highest at noon; In summer and autumn, LiDAR detection efficiency is positively correlated with PM_2.5 concentration, and negatively correlated with logarithm of precipitation, it provides an important basic guarantee for the accuracy of airport LiDAR identification of low-level wind shear.