The utility model discloses a hydrophobic charged measuring system of a composite insulator, which comprises a water spraying mechanism, a shooting mechanism and an insulating bar. The hydrophobic charged measuring system of the composite insulator is characterized in that the water spraying mechanism and the shooting mechanism are arranged at both ends of the insulating bar respectively, and an emission module for controlling the water spraying mechanism is further arranged on the insulating bar. By integrating the water spraying mechanism and the shooting mechanism, the hydrophobic charged measuring system of the composite insulator realizes the detection operation by a single person, and is simple in structure, convenient in operation, exact in measurement and can save the required manpower resource for measurement; by integrating an analyzing treatment module on the insulating bar, the integration of spraying, shooting and detecting is realized, and the hydrophobic state of the composite insulator in running can be acquired quickly and exactly. The hydrophobic charged measuring system of the composite insulator is applicable to the charged measurement of the hydrophobic nature of the composite insulator.