The invention relates to a bench test holding device for a hub motor and a rim motor. The bench test holding device for the hub motor and the rim motor comprises a motor stator fixed support seat and a motor rotor connecting assembly, wherein the motor stator fixed support seat comprises a motor base (10) mounted on bench rails, a height fine-adjustment plates (9) connected with the top of the motor base (10) through an inside hexagonal bolt, a fixed lower stator base (8) and a fixed upper stator cover (6), and the motor rotor connecting assembly comprises a transition gasket (4), a motor connecting flange (3), a coupling elastomer (2) and a dynamometer connecting flange (1). Compared with the prior art, the bench test holding device for the hub motor and the rim motor can adjust the spatial position of the hub motor within a certain range as needed as well as enhance the accuracy and the fault-tolerant capability of a dynamometer in center alignment with the axis of the hub motor, thereby achieving maximum protection for the dynamometer and the hub motor.