The invention relates to a skin pricking needle, and provides the skin pricking needle which is easy to control skin pricking depth, causes little pain, and has accurate test results and high detection efficiency. The skin pricking needle comprises an elongated needle body and a limiting piece; the limiting piece is provided with a through hole and comprises an extension fixing edge and a limiting edge; the needle body penetrates into the through hole of the limiting piece; the extension fixing edge of the limiting piece is fixed on the needle body by welding; a wrinkle with a transition fillet is formed outside the limiting edge; when a skin allergy prick test is performed, the pricking needle cannot prick into a corium layer, so that bleeding can be avoided; therefore, an accurate test result is obtained, and the detection efficiency of an operator is greatly improved; moreover, the welding contact area is large enough, so that the limiting piece is installed on the needle body more firmly; in addition, the skin pricking needle is simple in structure and low in manufacturing cost.