The utility model relates to an improved structure of a plant planting box.The utility model comprises a U-shaped convex strip and a corresponding inverted U-shaped convex strip arranged gradually from small to large on the inner surface of the bottom of a box.On the outside of the bottom of the box are a plurality of U-shaped grooves and corresponding inverted U-shaped grooves arranged gradually from small to large.The bottom of the box extends upward to form four sides.Each side is arranged with a rectangular groove spaced apart to connect with the shape of a rectangular convex block.And the inner surface of the side of the rectangular groove and the rectangular convex block forms the opposite form with the outer surface.A platform surface is formed above the four sides to expand outwards.With its platform, it can bear the planting plate.The periphery of the platform surface is convex with a frame shape to strengthen the strength of the periphery.The whole is made of plastic processing.To achieve light weight,Good strength,Stacking does not take up space to save transportation cost.It can be reused and has the effect of environmental protection and durability.一種植物栽種箱改良構造，包含一箱底部內面設複數由小至大漸次排列的U型凸條及對應的倒U型凸條，箱底部外面則為複數由小至大漸次排列的U型凹槽及對應的倒U型凹槽，箱底部四周往上延伸形成有四個側面，每個側面均排設間隔的長方凹槽接長方凸塊的形狀，並使長方凹槽與長方凸塊於側面的內面與外面形成相反的形態，四個側面上方形成有一平台面往外擴張，以其平台面恰可以承載栽種盤，平台面周邊凸設框形周緣以強化周邊的強度，整體以塑膠加工一體成型，藉此達到重量輕、強度佳、堆疊不占空間節省運輸成本，可重覆使用及環保又耐用之功效。
