Abstract: The formation mechanism of charged-particles,the principle of electrostatic sensor and gas path electrostatic monitoring technology were discussed in this paper,then the simulated experimental system and experiment process were analyzed to make a preliminary exploration on gas path electrostatic monitoring technology;lastly,the energy distribution characteristics of experimental signal was studied via wavelet analysis.The results show that,the signal induced by large particle has the characteristic of large amplitude and energy distribution on low frequency band,but the signal induced by fine particle has the characteristic of small amplitude and energy distribution on high frequency band.The result provides a reference for distinguishing abnormal particle and proves the feasibility of monitoring method based on charged particle.