Provided is a geotechnical cloth synthesis soil structure drainage ditch. A bottom layer, a middle layer and an upper layer of a geotechnical cloth synthesis soil structure are sequentially arranged on the ditch wall on the two sides of the drainage ditch from bottom to top. The top face of the upper layer is provided with a coping layer, a ditch bottom raw soil layer is arranged in the middle of the ditch bottom in the length direction of the drainage ditch, and the two sides of the ditch bottom raw soil layer are respectively provided with a permeable base angle protective layer. The outer side of the bottom layer, the outer side of the middle layer, the outer side of the upper layer and the bottom of the bottom layer are all provided with broken stone and coarse sand layers, claypan layers are arranged beside the broken stone and coarse sand layers, and the outer surfaces of the bottom, the top and the inner side of each layer are all wrapped with geotechnical cloth. The geotechnical cloth synthesis soil structure drainage ditch is strong in stability, the permeability of the ditch wall is strong, and the technical problems that the inside of a ditch body of a drainage ditch in farm fields and outside soil are completely isolated, so that water in the middle layer and the lower layer of soil of a farmland can not be drained out, waterlogging exists in the soil for a long time, the ventilation and the permeability of the soil are bad, water in the ditch body in dry seasons can not seep back into the soil of the farmland,, and therefore water resources are wasted are effectively solved.