Disclosed are a transapically-implanted mitral valve flexible closure plate blocking body and an implantation method which belong to the technical field of human heart repair. A flexible closure plate (7) is implanted via a small incision on the left side of the chest, enters the left ventricle (3) via the cardiac apex (4), and is placed and fixed at a regurgitation gap position of the anterior and posterior leaflet junction (5) of the mitral valve (2). During diastoles, the mitral valve (2) opens, and blood flows from the left atrium (1) to the left ventricle (3) via two channels between the anterior and posterior leaflets (2.2, 2.3) and the closure plate (7). During systoles, the anterior and posterior leaflets (2.2, 2.3) close, the edges of the leaflets squeeze the closure plate (7) so that the plate deforms slightly, and the edges of the leaflets and the slightly deformed closure plate (7) are tightly bound together, thereby blocking a regurgitation gap of the mitral valve (2), and effectively preventing regurgitation of the mitral valve (2). The flexible closure plate blocking body is simple in structure and highly reliable, the implantation method thereof causes little trauma of the body, and the residual regurgitation rate is low. The present invention treats diseases such as functional mitral valve insufficiency, and the success rate for repairing functional mitral valve regurgitation is more than 90%.
