In the structure of two parallel-connected asynchronous motors controlled by a single inverter under the same bogie of metro, factors such as wheel diameter difference or different motor parameters will lead to the large torque difference between the motors and torque ripple. In order to solve this problem, a speed coupling load model of double asynchronous motors in parallel under the same bogie of metro is established. The direct torque control strategy based on space vector modulation is adopted, and the weighting coefficient of real-time calculation is introduced, so that the weight of direct torque control tends to the motor with smaller torque. The control scheme has the characteristics of smaller torque ripple, constant switching frequency of inverter, and smaller torque difference between motors. The simulation results show that compared with the average direct torque control, the weighted direct torque control method can effectively reduce the torque difference between the motors and decrease the torque ripple.