The invention provides an electric drive fault tolerant device with fault tolerating function, a multiphase motor, a power converter and an electric device. The electric drive fault tolerant device provided herein is used for driving the electric device and comprises a multiphase motor, a direct-current power source, a command transmitting portion, a current sensor, an output sensor, a battery management unit, a controller, a driver, and a power converter, and is characterized in that a winding of the multiphase motor includes j+i multiphase winding units, the direct-current power source has j+i battery units, the power converter has power conversion units in corresponding connection with the j+i multiphase winding units and the j+i battery units, each power conversion unit has k power conversion circuits which supply k linear currents to the corresponding multiphase winding units, the driver has j+i drive units in respective connection with the j+i power conversion units, k is a positive integer greater than 2, j is a positive integer greater than 1, and i is a natural redundant number.