The invention discloses a plant cultivation unit which comprises a box body, a plant pot body and a limiting device, wherein the box body is an installation space for limiting the plant pot body a watering opening is formed in the box body a water drainage pipe is arranged at the bottom of the box body, and is positioned at the end part in the box body to form water drainage outlets a through hole allowing the plant pot body to penetrate is formed in one side wall of the box body the plant pot body penetrates through the through hole to enable at least part of the plant pot body to be placed in the box body water inlets are formed in the part, positioned in the box body, of the plant pot body the limiting device enables the plant pot body to be obliquely mounted in the box body, wherein the height of each water inlet is less than that of each water drainage outlet. The plant cultivation unit provided by the invention can ensure relatively fixed connection between the plant pot body and the box body, ensures that the plant pot body is obliquely mounted in the box body, prevents the plant pot body and the box body from getting loose easily, and can prevent the plant pot body from being lost due to falling off.
