Based on the parallel observing data of the Automatic Weather Stations(AWS) and manual observatory in 2004 and 2005, the difference of regular and automatic wind speed, daily maximum and daily instantaneous maximum is analyzed. We found that the regular and automatic wind speed of AWS are larger than that of manual observing, and so is the daily maximum wind speed, but the daily instantaneous maximum wind speed of AWS are smaller than the manual observation. It indicates that after the national surface sounding system reforming, the continuity of observing data was influenced, and it is very important to do the continuity assessment work of all meteorological elements.