The invention relates to a two-speed dual clutch transmission drive unit for a pure electric vehicle. The two-speed dual clutch transmission drive unit comprises a motor, a dual clutch, a transmission box, an inner input gear shaft, an outer input gear shaft, an intermediate shaft and an output shaft. A gear on the inner input gear shaft is a first-gear driving gear; a gear on the outer input gear shaft is a second-gear driving gear; the intermediate shaft is provided with a first-gear driven gear, a second-gear driven gear and a main reducing driving gear; and the output shaft is provided with a main reducing driven gear. Power is delivered from the motor to be input to the dual clutch, and is delivered to a first-gear gear set (a second-gear gear set) through the inner input gear shaft (the outer input gear shaft), and then, a first-gear torsion (a second-gear torsion) is transmitted to the output shaft by a main reducing gear on the intermediate shaft to be output. The two-speed dual clutch transmission drive unit for the pure electric vehicle has the characteristics that 1, by adopting an integrated structure of the transmission and a reducer, the transmission and a main reducer of an electric vehicle are fused together, and thus, the power can be directly output to axletrees; a reducing mechanism is not needed, so that a drive system is more compact in structure, the number of parts is reduced, and the cost is reduced; 2, gears are shifted by adopting the dual clutch, and thus, the requirements of the gear shifting dynamic property and the economic efficiency of a traditional electric vehicle are met; the power of the motor is utilized optimally; and the driving distance of the electric vehicle is extended.