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A special cultivation device for selenium-enriched sprouts, belonging to the technical field of soilless cultivation devices, addresses the problems of excessive roots extending beyond the basket during hydroponics, which can easily disperse nutrients and impair water circulation, affecting the normal growth of seedlings inside the basket. Furthermore, roots can clog the gaps in the seedling tubes, also hindering seedling growth and development. The invention includes a main frame and a water supply tank fixed in the middle of the main frame's surface. Several sets of hydroponic tubes are equidistantly and parallelly fixed above the main frame. This invention can cut off excessively grown roots extending beyond the seedling basket, keeping the main growing roots inside the basket. This ensures the distribution of nutrients for sprout growth and prevents excessive root growth from obstructing the effective flow of water within the hydroponic tubes. It also prevents outward-extending roots from entangled with the roots of adjacent seedling baskets, thus avoiding damage to the sprouts during subsequent trimming.