The invention discloses a high-strength saline-alkali soil salt draining filter tube and a manufacturing method thereof. The salt draining filter tube comprises a chlorinated polyvinyl chloride tube layer at the outer layer and a polyvinyl chloride tube layer at the inner layer, wherein the chlorinated polyvinyl chloride tube layer comprises the following components: chlorinated polyvinyl chloride, polyvinyl chloride resin, organic fibers, calcium carbonate, dibasic lead phosphite, calcium stearate, zinc oxide, thiodipropionic acid and chlorinated paraffin; and the polyvinyl chloride tube layer comprises the following components: rigid polyvinyl chloride, polyvinyl chloride resin, calcium carbonate, zinc stearate, vinyl ester resin and talcum powder. The filter tube is high in strength, isgood in compression resistance, and has excellent flexibility. Water scales are very difficult to form as a result of surface tension of the inner wall of the filter tube, so that salt draining and conveying ability is favorably improved.