To study the impact of wind field on the accuracy of a rain gauge, numerical simulation of the wind turbulence for a single rain gauge and gauges with Alter and Tretyakov wind shield was performed. The results show that the maximum velocity increase ratio of a single gauge on the center line can reach 19%, located 8cm above the gauge mouth. The Alter and Tretyakov wind shield can effectively reduce the intensity and gradient of the wind above the rain gauge mouth. The blades of the Alter wind shield can reduce the maximum velocity on the center line of the rain gauge by 11%. Two strong eddy regions are generated on the 90°of the main stream direction, which destroy the uniformity of the streamlines and reduce the continuity of the wind above the rain gauge. Due to the more turbulent wind field, there may be an adverse effect on snow collection. The Tretyakov wind shield can reduce the maximum speed on the center line of the rain gauge by 7%. The special angle structure of the blade makes the wind field in the collecting region more uniform, which is in favor of snow collection. The Alter wind shield is superior to the Tretyakov in reducing the wind speed and wind gradient, but the vortex core region of the Tretyakov at the top of the rain gauge is less than that of the Alter at low wind speed, which is beneficial to the precipitation collection. The diameter of the Tretyakov wind shield is about 0. 3m smaller than that of the Alter. Therefore, the Tretyakov wind shield can be improved by increasing its diameter and the number of the blades to avoid the influence on the core area of the collecting region in the condition of high wind speed. The structure of the Tretyakov wind shield can be referred to improve the Alter wind shield and the influence on precipitation collection efficiency can be explored by increasing the angle of the blades.