Biologic valves and mechanical valves have their own advantages and disadvantages, and it is generally not possible to make a single comparison of which is better. 1. Biologic valves: Biologic valves are suitable for patients over 65 years of age. The advantage is that biologic valves are more resistant to thrombosis, and usually require only half a year of anticoagulation after surgery if there are no complications. The disadvantage is that biologic valves are more prone to calcification, have a shorter service life than mechanical valves, and are more expensive. 2. Mechanical valves: Mechanical valves are more suitable for young patients under the age of 65. The advantages of mechanical valves are that they have a longer service life and are less expensive than biologic valves. The disadvantage is that mechanical valves are more likely to cause blood clots, and patients generally need lifelong anticoagulation therapy after surgery. Patients are advised to choose a treatment plan that suits their needs under the guidance of a medical professional.