Backpack type water and fertilizer quantitative watering device

The utility model discloses a backpack type quantitative water and fertilizer applying device which comprises a box body, straps, a storage battery, a water pump, a fertilizer applying gun, a liquid level valve assembly and a controller, a partition plate is arranged on the lower portion of the box body and divides the box body into a water and fertilizer box and a containing box, the storage battery and the water pump are installed in the containing box, and an inlet of the water pump is communicated with the water and fertilizer box. The liquid level valve assembly comprises a liquid level valve body and a water inlet connector, the liquid level valve body is located in the water and fertilizer box, the water inlet connector is communicated with an inlet of the liquid level valve body, the controller is connected with the water pump, and the storage battery is connected with the water pump and the controller. The device is simple in structure and convenient to operate, when water and fertilizer in the water