Water irrigation device suitable for crop planting

The invention relates to the technical field of crop planting, and discloses a water irrigation device suitable for crop planting, which comprises an annular cavity, an elastic energy storage type valve structure, a driven ball limiting structure and a pneumatic film type telescopic structure. The water irrigation device suitable for crop planting is installed at the ridge of the water inlet position of a farmland, after the water irrigation device is started, a water source can normally flow into the farmland from a water channel, once the depth of the water source in the farmland meets the required requirement, the water flow blocking effect on the water inlet position can be achieved in time according to the Venturi effect, and the water irrigation effect is improved. According to the device, the water flow is effectively prevented from being too large, meanwhile, blocking does not need manual external force intervention, the function of active cutoff is achieved, and in addition, the device has the high c