Abstract: During the operation of the electrostatic precipitator, the stability of electric field voltage regulation is directly related to the dust removal efficiency and system energy consumption. Traditional pressure regulation methods rely on manual or fixed curve control, which is prone to response lag and control distortion under complex working conditions, making it difficult to balance efficiency and safety. To solve this problem, this paper proposes an automatic voltage regulation strategy for electrostatic electric field based on PLC. The method realizes the real-time acquisition of voltage, current, dust concentration and spark rate through multiparameter sensors, and constructs a dynamic judgment and adaptive adjustment model under the PLC logic framework, and introduces the combination of PID and fuzzy control to ensure the stable operation of the electric field under different working conditions. The engineering application results show that the proposed strategy is significantly better than manual regulation under the conditions of low load, high dust concentration and rapid load change, which not only effectively reduces the voltage fluctuation and spark rate, but also improves the dust removal efficiency and optimizes the unit energy consumption, which verifies the engineering feasibility and popularization value of the