The invention relates to a metal alternative extrusion forming device and method and relates to a labor-saving extrusion forming device and method. The device and method solve the problems that according to an existing extrusion forming device and method, needed energy consumption is large, flowing uniformity is poor, and the material utilizing rate is low. According to the scheme of the device, an extrusion container is arranged on a base, a core die is arranged at the bottom of the extrusion container, blanks are arranged in the extrusion container and located above the core die, and one end of a first punch and one end of a second punch are arranged in the extrusion container and abut against the upper end faces of the blanks. According to the scheme of the method, the core die, the blanks, the first punch and the second punch are sequentially placed in the extrusion container; the second punch is fixed, the first punch moves downwards by the distance of L, and metal on the lower side of the first punch is extruded and deformed and is sequentially extruded and formed; then the first punch is fixed, the second punch moves downwards by the distance of 2L, and the blanks below the second punch are made to be extruded and formed. According to the acting sequence, the first punch and the second punch alternatively move downwards for loading till the blanks are totally extruded. The device and method are used for metal forming.