The embodiment of the invention provides a method and apparatus for controlling a Vienna rectifier. The method comprises: when current inner-loop controlling is carried out on a Vienna rectifier in agrid-connected state, a grid voltage and a grid current are monitored in real time; if a phase difference exists between the grid current and the grid voltage and the phase of the grid voltage belongsto a zero-crossing region of the grid current, a quadrature axis current given value in the current inner loop is adjusted, so that the Vienna rectifier is controlled by using the adjusted quadratureaxis current given value and thus the phase of the grid current is identical with that of the grid voltage. Therefore, when a certain phase difference exists between the grid voltage vector and the grid current vector, execution of a wrong voltage vector near a current switching point is avoided, so that the system stability is kept.