Power knee joint exoskeleton

The utility model provides a power knee joint exoskeleton, relates to the technical field of wearable walking aids, and aims to solve the problems that existing knee joint power exoskeletons are generally heavy, high in cost and tedious to wear, most of the existing knee joint power exoskeletons can only be used in specific environments, some of the existing knee joint power exoskeletons even need to be assisted by a rack, and autonomous steering of a user is seriously affected. The device comprises a thigh exoskeleton, a shank exoskeleton and an actuator, the thigh exoskeleton at least comprises a thigh support and a first connecting assembly, the first connecting assembly is arranged at one end of the thigh support and used for being connected with a thigh, and the actuator is arranged at the other end of the thigh support; the shank exoskeleton at least comprises a shank support and second connecting assemblies, the second connecting assemblies are arranged at the two ends of the shank support and used for