Magnesium alloy possessing extruding characteristic at room temperature and method for preparing extrusion material

The invention belongs to the metal material and metallurgy technology field, concretely relates to a magnesium alloy possessing an extruding characteristic at room temperature and a method for preparing an extrusion material. The magnesium alloy of the invention is low Zn and low rare earth alloyed Mg-Zn-RE phase magnesium alloy, which contains the following components by mass percent: 1.0-3.0% of Zn, 0.1-1.0% of Y, Nd, Gd, Ce or MM, and the balance of Mg. The method of the invention is characterized in that a magnesium alloy billet is subjected to semi-continuous casting by using a low frequency electromagnetic oil, then a reverse extrusion device is used for carrying out a reverse extrusion on the Mg-Zn-RE phase under the room temperature, the extrusion ratio is 8-20, the extrusion speed is 4.5-8m/min, the extrusion material of the Mg-Zn-RE phase magnesium alloy can be obtained. The room-temperature tensile property of the extrusion material of the Mg-Zn-RE phase magnesium alloy possesses high plasticity index.