Garden water supply and fertilizer application device and operation method thereof

The invention relates to the technical field of garden water supply and fertilizer application, in particular to a garden water supply and fertilizer application device which comprises a frame provided with a water storage barrel, a chemical fertilizer storage box arranged at the top of the water storage barrel, and a quantitative material taking device arranged in the water storage barrel; the crushing assembly is arranged below the quantitative material taking device; the water pipe is communicated with the water storage barrel, one end of the water pipe is connected with a spray irrigation cover, a spray pipe is arranged on the spray irrigation cover, and a cleaning assembly is arranged in the water pipe; the chemical fertilizer crushing device has the beneficial effects that through cooperation of a second motor and a third rotating shaft, a crushing rod rotates in the crushing box, unfiltered chemical fertilizer is stored below a crushing block due to the arrangement of a diagonal plane, when an elastic