Based on the real time horizontal wind data of the wind profiler radar in Jiulong Station, a horizontal wind data quality control method is developed. The method acquires the following: the median horizontal wind field, the difference sequence between observed wind field and median horizontal wind field, the mean square deviation of the difference sequence, the quality control discriminant by the mean square deviation of the difference sequence, and the threshold in quality control discriminant through experiment. According to the quality control results of the wind profiler radar horizontal wind data over Jiulong Station in 2017, a total of 2044185 wind direction data have been observed, and 25721 wind direction data do not pass the quality control, with the proportion of wind direction data without passing the quality control being 1.258%. The wind direction data passed the quality control mostly in the surface layer, and the data passing the quality control decrease with height. A total of 2044185 wind speed data have been observed, 18296 do not pass the quality control, with the proportion of wind direction data without passing the quality control being 0.895%. The wind speed data passing the quality control are found mostly in 2000 to 4000 m, then in the surface layer, and the least in 4500 to 7000 m. The root mean square error decreases after quality control, and the correlation coefficient increases after quality control. Wind direction data quality is improved significantly from 500 to 7000 m, and wind speed data quality is improved significantly form 1500 to 8000 m.