The invention relates to the field of electric vehicle power transmission, in particular to a transmission system used for an electric vehicle. The transmission system used for the electric vehicle comprises a transmission, a differential mechanism and a half axle, wherein the transmission comprises an input shaft, a low-gear gear pair, a high-gear gear pair, a low-gear electromagnetic clutch and a high-gear electromagnetic clutch; the driven gear of the low-gear electromagnetic clutch and the driven gear of the high-gear electromagnetic clutch are respectively fixedly arranged on two ends of the shell of the differential mechanism along the circumference; the low-gear gear pair and the high-gear gear pair are used for transferring the power of the input shaft to the differential mechanism in a speed change and bending moment mode; the differential mechanism and the half axle are used for causing the power transferred by a low-gear driven gear and a high-gear driven gear to be differential; the power is output by the half axle. The transmission system used for the electric vehicle, which is disclosed by the invention, has the advantages of simple, compact and flexible structure, easiness in driving and high comfort level, is suitable for both front-wheel drive and rear-wheel drive, and is favorable for interval vehicle arrangement. The two-gear transmission is adopted, a motor can be caused to work in a high-efficiency area, the service life of the motor is prolonged, the power performance of the vehicle is improved, driving ranges are increased, and speed change is free from power failure.