High Voltage Passive Harmonic Filtering Equipment can conduct automatic detecting and real time compensation on the power network responding to load change, which makes the power factor of the system remain the optimal point. The Equipment can be used in metallurgy, mining, oil, chemistry, machine making, light industry, and municipal construction as well. The Equipment can control switch on/ off of all compensation branches, achieving accurate power factor improvement. The High Voltage Passive Harmonic Filtering Equipment has accurate compensation, short-time response and is free from vibration while switching on/ off.