As the power grid developing, high-voltage electroscopes have higher requirement.This paper proposes a non-contact high-voltage vibrating capacitance electroscope method, which uses a vibrating capacitor electroscope probe to perform power inspection on the transmission line. Using Maxwell to study the feasibility of vibrating capacitance sensor technology for high-voltage testing.When the vibrating capacitor electroscope is placed in a high voltage electric field environment, the vibrating capacitor plate can detect the electric field of the charged device. The research results show that the method based on vibration capacitance sensing technology can detect the electrification state of transmission line under high-voltage electrmagnetic environment, and has the advantages of good stability, high sensitivity, and can be applied both AC and DC.