The Lingui National Meteorological Observatory of Guilin, Guangxi, observed an extreme high wind of 60.3 m/s at 21:13 on 21 March 2019. The data users doubted the authenticity of the wind speed observations. The observation data of Lingui Station, including main AWS and backup AWS, were analyzed, and the wind sensors were replaced for verification. According to the comprehensive analysis, it is concluded: (1) The observational data of Lingui Station’s main AWS and backup AWS had the same trend before and after the occurrence of the extreme wind. The changes in the observation elements conformed to the logical relationship between the elements, so the observation data of Lingui Station are credible. (2) The verification results show that there is still a good linear relationship between the frequency of the wind speed sensor and the wind speed. The wind speed value corrected according to the new linear relationship is closer to the true value of the extreme wind at Lingui Station. Based on the analysis and summary of the authenticity of the maximum wind speed observations at Lingui Station, the suggestions are put forward in three aspects: data quality control, observation data extreme value identification and correction application, as well as the equipment operation and maintenance measures.