Due to its advantages such as low cost and high space utilization, the electric-drive-reconstructed vehicle-to-grid (V2G) system has become a research hotspot recently. The open-phase fault is inevitable during the operation of the electric-drive-reconstructed V2G system, under which the grid-side current will fail to keep balance and the motor torque may even increase sharply. Therefore, there are many potential safety problems. Aimed at these problems, an electric-drive-reconstructed V2G system based on an asymmetric six-phase permanent magnet synchronous motor is constructed, and its fault tolerant control scheme under open-phase fault is proposed. First, the circuit topology of the six-phase electric-drive-reconstructed V2G system is analyzed. Second, the relationship between the grid-side current and the motor’s x-y space current is deduced, so that the working mechanism of the system during its normal operation is obtained. Third, a fault tolerant operation scheme for the six-phase electric-drive-reconstructed V2G system under open-phase fault is put forward by injecting current to the o₁-o₂ space of the motor, so as to produce zero torque and balanced grid-side current and ensure the system’s normal operation under open-phase fault. Finally, a 270 W experimental prototype was built, and experimental results verified the feasibility of the system and its fault tolerant operation scheme.