Se-enriched soybean planting device and planting method

The invention provides a Se-enriched soybean planting device and a planting method. The Se-enriched soybean planting device comprises a bottle body, a straw, an upper cover and a painting assembly, wherein the painting assembly is connected to the upper end of the upper cover; the straw is connected with the painting assembly through the central position of the upper cover; the upper cover is connected with a neck of the bottle body through a thread structure. The problem that the intake of selenium by human bodies is incomplete is effectively solved, the added value of general soybean is improved, the cost is reduced, and the efficiency is improved.