The invention provides a simple potted-plant drip irrigation device. The device comprises an inner cylinder, a middle cylinder and an outer cylinder which are arranged in a vertical direction; the middle cylinder sleeves the inner cylinder; the inner wall of the middle cylinder is attached to the outer wall of the inner cylinder; water outlet holes are formed in the middle cylinder and the inner cylinder correspondingly; an opening is formed in the upper end of the outer cylinder; the inner cylinder and the middle cylinder are both arranged in the outer cylinder; the bottom of the outer cylinder communicates with liquid guide pipes; and flow adjusting valves are arranged on the liquid guide pipes, wherein the flow adjusting valves are similar to a flow adjusting valve used for a medical injection dropper. The drip irrigation device is used for solving the problems that existing drip irrigation devices are tedious in design, too high in cost, uneven in water and fertilizer application,poor in cost performance and experience, and the like. The invention belongs to the technical field of drip irrigation.