The invention discloses an unpowered walking resisting flexible exoskeleton device, including a walking device and a power device. The walking device is arranged on lower limbs of a person, and is linked with the power device, to receive power output by the power device and drive the lower limbs of the person to walk. The power device comprises a pedal mechanism and a linkage mechanism. The pedalmechanism is arranged on a shoe sole of a person, and is used for a person to step to output power. The linkage mechanism is arranged on a leg of the person, and is linked with the pedal mechanism andthe walking device, and is used to receive output power of the pedal mechanism and transfer power to the walking device to drive the walking device to walk. Through arranging the pedal mechanism andthe linkage mechanism, the unpowered walking resisting flexible exoskeleton device can effectively realize effect that tread power in a walking process of a person is transmitted to the walking device. Thus, the structure is simple, cost is low, and an external power source is not needed.