Rapid and accurate regulation fertilizer applicator and control method thereof

The invention discloses a rapid and accurate regulation and control fertilizer applicator and a control method thereof. The fertilizer applicator comprises a water pipe, a flange, a water pump, a junction station, a water segregator, a venturi and a fertilizer conveying device, the multiple water distributors and the multiple flow converging devices are arranged, and the water distributors and the flow converging devices are arranged in a one-to-one correspondence mode. A plurality of fertilizer conveying devices are arranged, each fertilizer conveying device comprises a fertilizer input pipe, a visual float flowmeter, a valve and a high-speed pulse electromagnetic valve which are connected in sequence, each fertilizer input pipe correspondingly inputs one kind of fertilizer mother liquor, and the high-speed pulse electromagnetic valve is communicated with the water outlet end of the water segregator; and the fertilizer mother liquor can be sucked into the junction station by negative pressure generated by th