The control strategy is proposed after deep research of the topology and mathematical model of PWM rectifier, which is based on phase current reconstruction and virtual flux. The threephase alternating current can be reconstructed according to the DC bus voltage and switch signal. After conditioning filter, the reconstructed current can create a virtual grid flux to get the information needed to estimate the angle of voltage and current for coordinate transformation. The control strategy can not only be used as an sensorless control strategy for PWM rectifier, but also can be use as an alternate control strategy to reduce the impact caused by sensor failure and improve the reliability of system. The experimental platform was designed which is based on RTLAB realtime simulation hardware circuitry and digital processors TMS320F28335. The experiment result shows the correctness and feasibility of this control strategy.