The invention discloses a power-assisted manipulator and belongs to the field of mechanical engineering. The problems that the carrying speed and strength of manipulators cannot be controlled manually, and workpieces with high mass and different sizes are difficult to dismount and mount are solved. The power-assisted manipulator comprises an arm provided with a first locking part, an adapter partwhich is hinged to the arm through an X-direction hinge shaft so that the arm can rotate around the X-direction hinge shaft, a locking mechanism detachably fixed to the adapter part, a connecting partwhich is hinged to the adapter part through a Z-direction hinge shaft so that the adapter and the arm which are connected fixedly can rotate around the Z-direction hinge shaft simultaneously, and a lifting driving mechanism which is connected with the connecting part and used for driving the connecting part, the adapter part and the arm to move in the Z direction, wherein the arm rotate around the X-direction hinge shaft to attach to the adapter part, the locking mechanism is locked with the first locking part so that the arm and the adapter part can be fixedly connected. The manipulator is simple in structure, convenient to operate and powerful in function, and the effect of carrying weights like light objects is achieved.