Abstract: Based on the data of wind velocity, temperature and humidity collected by the gradient system of the 32-meter meteorological observation tower of Shouxian National Climatology Observatory, the daily variation characteristics and profile characteristics of wind velocity, temperature and humidity in the surface layer of cropland in Shouxian from July 2007 to December 2019 were analyzed. The results show that the daily variation of temperature and wind velocity is unimodal. The peak value of temperature is from 14:30 BT to 16:00 BT, the valley value is from 05:30 BT to 08:00 BT, and the occurrence time of low layer is earlier than that of high layer. The peak value of wind velocity is from 11:30 BT to 13:30 BT, and the valley value is from 00:30 BT to 03:00 BT. The daily variation of humidity is bimodal. The main peak value is from 08:30 BT to 11:00 BT. The low level of the main valley value is from 05:00 BT to 07:00 BT. The high level is from 15:00 BT to 15:30 BT and 07:00 BT to 08:00 BT.The air temperature decreases with altitude in the daytime, increases with altitude in the evening, decreases first and then increases with altitude in the morning, and increases first and then decreases with altitude in the evening. The maximum value of vertical decline rate of white weather temperature appears from 12:00 BT to 12:30 BT, the maximum value of inversion appears from 21:00 BT to 03:00 BT in the evening, the morning transition type appears from 07:30 BT to 09:00 BT, and the evening transition type appears from 17:30 BT to 19:00 BT. The wind velocity increases with height, and the wind velocity gradient decreases with height.The vertical increasing rate of wind velocity in daytime is significantly lower than that in nighttime. The maximum value appears from 21:00 BT to 01:00 BT. Humidity decreases first, then increases and then decreases with height. There is reverse humidity phenomenon in 10-20 meters, and it is more obvious at night than in the daytime, especially in the latter half of the night.