A stirring and separating device for high-value components of a waste PCB and a control method thereof are disclosed. The stirring and separating device comprises an insulated outer tank for accommodating a desoldering flux. The insulated outer tank is provided with a stirring mechanism. The stirring mechanism includes a main rotation shaft. A plurality of spaced cross beams are mounted at a bottom of the main rotation shaft. Each of the cross beams is provided with a secondary rotation shaft. A bottom of each of the secondary rotation shafts is rotationally connected with a stirring wheel through at least two connecting rods. At least two connection points are formed between each of the at least two connecting rods and the stirring wheel. When any one or more of the at least two connection points are disconnected, the stirring wheel rotates to a different angle.