A three-phase single-stage isolated bidirectional converter and a method of controlling same are provided. The bidirectional converter includes a three-phase AC voltage port, a DC voltage port, full-bridge circuit units, half-bridge circuit units, phase-shift inductor units, transformers, and filter capacitors. The first full-bridge circuit unit is connected to the first half-bridge circuit unit. The third full-bridge circuit unit is connected to the second half-bridge circuit unit. The fifth full-bridge circuit unit is connected to the third half-bridge circuit unit. The first half-bridge circuit unit is connected to the first filter capacitor. A midpoint of a bridge arm of the first half-bridge circuit unit is connected to a second port. A midpoint of a bridge arm of the second half-bridge circuit unit is connected to a fourth port. A midpoint of a bridge arm of the third half-bridge circuit unit is connected to a sixth port.