An aortic valve implantation device that is delivered through a catheter and does not depend only on friction for fixation. According to the device, multiple supporting arms (50) are provided on a middle portion (102) of a tubular body (105); the supporting arms are "D"-shaped after being fully opened, and are fixed between a narrowest part (73) of the aorta close to the heart and a narrowest part (74) on an aortic annulus (70), so as to achieve full fit between the outer surfaces of the supporting arms (50) and surrounding tissue; each supporting arm (50) comprises three landing areas (54) and two bending parts (59). The present invention can accurately control the position of a valve to be released on the aortic annulus (70), and thus, adverse events caused by existing fixation by friction only are avoided, thereby better solving aortic valve diseases.
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