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Using PDPA measuring system, the agricultural high-voltage electrostatic spraying field was tested and analyzed from the aspect of spraying width, diameter and velocity distributions of droplets. The experimental results indicated that the average particle diameter declined by using electrostatic spray, but the uniformity of particle diameter distributions and the symmetry of velocity distributions were not fine in initial stage of charge application. In the range of 30 kV voltage, average particle diameter and average velocity increased slightly but their distribution condition improved continuously along with the increment of voltage. And the appropriate voltage depended on the practical occasions of electrostatic spraying application. When the voltage was up to 40 kV, droplets were easy to adhere to the plants surface and the excellent comprehensiveness technology performance could be obtained. 