Construction method of windbreak

The invention provides a construction method of a windbreak, and belongs to the technical field of agricultural planting. The method comprises the step that sorghum, fruit mulberries and sorghum are sequentially planted in the outermost periphery of a desert, wherein the planting row number of the fruit mulberries is 2, and alfalfa is planted between the two rows of fruit mulberries. According tothe method, the sorghum serves as a barrier for protecting fruit mulberry seedlings through the characteristics of barren resistance and quick growth, nitrogen provided by the biological nitrogen fixation function of the alfalfa can promote the growth of the sorghum and the fruit mulberries, the yield increase of the sorghum and the fruit mulberries is promoted, and the influence of soil nitrogendeficiency on plants is reduced. Meanwhile, since a large amount of nitrogen in the soil is absorbed for the growth of the sorghum and fruit mulberries, the nitrogen content in the soil is reduced, and the alfalfa can be effec