Automatic control three-dimensional drop irrigation device

The invention discloses an automatic control three-dimensional drop irrigation device. The automatic control three-dimensional drop irrigation device comprises a support, a water tank, a main pipe, branch pipes and soil humidity sensors, wherein the water tank is fixedly arranged on the upper portion of the support; the main pipe and the branch pipes are fixedly arranged below the water tank; the upper end of the main pipe penetrates through the bottom of the water tank to extend into the water tank to the upper portion of liquid to be closed or be higher than the liquid face; the part, extending into the water tank, of the main pipe is provided with multiple water inlet holes from top to bottom; the lower end of the main pipe is blocked; one ends of the branch pipes are communicated with the main pipe and provided with control valves; the other ends of the branch pipes are blocked; the soil humidity sensors are arranged in soil where plants grow. The water utilization rate is high and can reach 90-95%, and balanced irrigation of water and fertilizer can be achieved; as the irrigation device and the sensors are combined, a water supply valve is automatically opened and closed, and time is saved; as pressure generated by the dead load of water serves as water supply power, excess energy is not consumed.