A new kind of sprinkler—double-nozzle jet sprinkler was developed. And its structure and working principle were introduced. First of all, the numerical simulation of jet sprinkler, whose nominal diameter of inlet is 10 mm was conducted. The working mechanism of the jet sprinkler was analyzed by studying the internal flow under macro and micro conditions, which mainly includes the flow state of the pressure flow in the control pipe and the transformation process of the low-pressure eddy current in the jet space. The radius of double-nozzle jet sprinkler was studied, and under the condition of 0.05-0.25 MPa, the combined spray irrigation was carried out with nozzles of 6.0,4.0,2.5,1.5 mm. The results show that the radius of double-nozzle jet sprinkler was from 6 m to 16 m, the furthest radius is the jet sprinkler with 4.0 mm×2.5 mm nozzle diameter and the nearest radius is the jet sprinkler with 6.0 mm×6.0 mm nozzle diameter, followed by the jet sprinkler with 2.5 mm×1.5 mm nozzle diameter. The sprinkler radius can meet the requirement of sprinkler irrigation.
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