With the increase of acceleration and range requirements of electric vehicles, the requirements on power density and efficiency of electric drive unit also keep increasing. Aiming at this problem, the advantages of SiC materials are analyzed, and a pure-electric solution of electric drive unit based on SiC is given. The comparative bench tests for SiC-based and Si-based electric drive units are carried out separately. The test results show that the SiC-based electric drive unit can greatly improve the output power and efficiency, and significantly improve the acceleration and mileage performance of electric vehicles without increasing the size of drive unit. As an effective solution to improving the performance of electric vehicles, SiC-based electric drive unit will be the development direction of high performance electric vehicles in the future.