Sand-dust-preventing steel mixed wall

The invention provides a sand-dust-preventing steel mixed wall which is designed aiming at invasion of sand dust of Siberia cold wind and Mongolia to China and the characteristics that rough and large sand grains are concentrated in the sand dust in a space below 50 meters to be operated and cold air drops. The sand-dust-preventing steel mixed wall with the height of 60 meters can be established from east to west in a China-Mongolia boundary line. A second steel mixed wall with the height of 60 meters is established at a part which is 20km far away from a first steel mixed wall. A third steel mixed wall with the height of 60 meters is established at north which is 20km away from the southeast of Beijing. Meanwhile, a reexamined sand-dust-preventing concrete pinch plate is implemented and trees are planted, so that the sand dust prevention becomes effective and fast; and the sand dust can be effectively and completely prevented for a long period of time and garden preventing effect is realized. According to th