The main circuit of three-phase bridge PWM rectifier is introduced, and the operational principle by which it realizes unit input power factor and does not pour harmonics into power network is analyzed. On the base of those, a new system configuration for high power three-phase PWM rectifier, whose main circuit consists of parallel two modules, is proposed, and its control approach and corresponding control system as well as the driving and protective circuit are discussed. Finally, the experiment for the prototype of capacity 100kW is investigated. The results show the good performance of the three-phase high power PWM rectifier presented.