A prosthesis valve comprises leaf skirt (1) with an annular structure formed by a plurality of sequentially spliced leaf skirt units (11). The leaf skirt (1) is provided with a plurality of notches (13). A position each notch (13) is located is correspondently provided with a leaf lobe (2) and a boundary of each notch (13) is a fixing edge (131) of the leaf lobe. The sewed boundary of two mutually sewed adjacent leaf skirts (11) is a spliced line (111) two ends of the spliced line (111) of the adjacent leaf skirt units (11) are separately located on the fixing edge (131) of the leaf lobe and the bottom edge (12) of the leaf skirt (1) and the spliced line (111) is distributed along a shortest route between the fixing edge (131) of the leaf lobe and the bottom edge (12) of the leaf skirt (1). Compared with the spliced line in the prior art the spliced line (111) is the shortest so that the minimum number of threads for sewing the spliced line (111) is needed thereby reducing the risk caused by the manual sewing and improving the use safety.
