The invention relates to a zinc alloy material for a degradable cardiovascular stent and a preparation method of the zinc alloy material, and belongs to the technical field of materials. The zinc alloy material comprises, by weight, 0.03-0.07% of Mg, 0.03-0.07% of Mn, less than or equal to 10ppm of inevitable impurities and the balance Zn. The preparation method comprises the following steps that (1) pure zinc is heated to 600 +/-5 DEG C, melted, magnesium metal, manganese metal and phosphorus are sequentially added, and uniformly stirred, the temperature is reduced to 550 +/-5 DEG C, hexachloroethane is pressed to preserve heat and stand for 10-20 minutes, and metal melt is cooled to 500 +/-10 DEG C, and cast; (2) secondary magnetic suspension smelting is carried out, so that the component uniformity deviation is smaller than +/-0.02 wt.%; (3) heat is preserved at 350 DEG C for 5 hours, temperature is raised to 370 DEG C, heat is preserved for 5 hours, and cooling is performed to the room temperature in water; (4) heat preservation is conducted for 60-80 min at the temperature of 300-400 DEG C, and then hot forging deformation is conducted at the temperature of 300-400 DEG C; and (5) heat preservation is conducted for 30 min at the temperature of 150 DEG C, and then reverse hot extrusion deformation is conducted at the temperature of 150 DEG C. According to the zinc alloy material for the degradable cardiovascular stent and the preparation method of the zinc alloy material, a Zn-Mg-Mn alloy is excellent in mechanical property and uniform in tissue component, and can be used for preparing the biodegradable cardiovascular stent.