This creation provides a kind of positioning auxiliaring tool, it includes: a cover, with the opening of one of position what opposite end first and one second opening, and the periphery of cover is equipped with an aspirating hole and can be connected to inside cover, and aspirating hole inhales device connection for a purt； And a soft part, the opening of what first is set, the first opening is sealed, and soft part wears for an injection needle, so that injection needle is inserted into inside cover.本創作提供一種定位輔助工具，其包含：一罩體，其具有位於相反端之一第一開口及一第二開口，且罩體之周緣設有一抽氣孔可連通至罩體內部，抽氣孔可供一唧吸裝置連接；以及一軟性件，其設於第一開口，以將第一開口密封，且軟性件可供一注射針穿設，俾使注射針插入至罩體內部。
