The utility model relates to the technical field of connectors, and provides a fool-proof positioning connector, which comprises a top frame, a bottom plate, a first side plate, a second side plate, a separation block, a limiting block and a positioning column, and is characterized in that the top frame is vertically opposite to the bottom plate; a cavity is formed among the top frame, the bottom plate, the first side plate and the second side plate, and the partition block is arranged in the cavity and divides the cavity into a limiting groove; one end of the limiting groove is a wire harness plugging port, and the other end of the limiting groove is a terminal plugging port; the limiting block is connected to the top frame and located in the limiting groove, and the limiting block is used for limiting a card on the terminal; the positioning column is connected to the second side plate, one end of the positioning column extends, the positioning column extends towards the end where the terminal plugging port is located, the length direction of the positioning column is parallel to the length direction of the limiting groove, and the positioning column is used for being plugged on a PCB. According to the invention, the wire harness and the PCB can be better positioned and welded conveniently.