Water planting seedling growing method of vegetables

The invention discloses a water planting seedling growing method of vegetables. The method includes the following steps that first, a cathode screen is laid; second, a planting box is placed, a planting net is arranged inside the planting box in an erecting mode, and a spraying device is mounted on the planting box; third, an anode screen is arranged in an erecting mode; fourth, sowing is carried out, wherein seeds needing to be sown are evenly scattered on the planting net; fifth, electric field treatment is conducted, wherein a positive electrode screen and a negative electrode screen are electrically connected to a corresponding positive electrode and a corresponding negative electrode of a plant field generator, and the electric field treatment is conducted on an electric field; sixth, seedlings are strengthened, wherein a nutrient solution is injected into the planting box until the nutrient solution can just make contact with the lower surface of the planting net after seed germination; seventh, transpl