A mowing blade includes a base and two paddles. The base has first and second sides. The paddles are combined on the base, but they are designed to be detachable from the base. Through the structural design of the combination of the base and the paddles, the paddles can be selected to be assembled on the first or second side of the base, thereby improving the service life of the mowing blade.一種割草刀片,包含一基座、兩個撥片,該基座具有第一面與第二面,該撥片是組合於基座,但卻是設計可被拆離基座,透過該基座與該撥片之組接結構設計,使得撥片可以於被選擇組裝於基座的第一面或第二面,藉此可提高割草刀片的使用壽命。