High-strength soluble magnesium alloy and preparation method thereof

The invention discloses a high-strength soluble magnesium alloy and a preparation method thereof. The high-strength soluble magnesium alloy comprises the following components in percentage by mass: 0.5-2.0% of Zn; 0.5% to 1.5% of Cu; 0.2% to 0.5% of Zr; ni: 0.5%-1.5%, and X: 9.2%-13.0%; the balance is Mg and inevitable impurity elements; wherein X is a combination of a light rare earth element and a heavy rare earth element, the mass percent of the light rare earth element is 0.2%-2%, and the mass percent of the heavy rare earth element is 9%-11%. The high-strength soluble magnesium alloy is higher in tensile strength and yield strength and better in mechanical property. The preparation method of the high-strength soluble magnesium alloy is simple in scheme, and it can be guaranteed that the mechanical property of the high-strength soluble magnesium alloy is not affected by the extrusion ratio by arranging the steps of homogenization, pre-aging, aging treatment and the like. 本发明公开了一种高强可溶镁合金及其制备方法，该高强可溶镁合金按照质量