Three-dimensional positioner for sacroiliac joint screws

The invention relates to a three-dimensional positioner for sacroiliac joint screws, and belongs to the technical field of orthopedic surgery instruments. The three-dimensional positioned is used for assisting in implanting the fixing screws in the sacroiliac joint. According to the technical scheme, the three-dimensional positioner comprises a double-pin perspective positioning part and a screw guiding part, two positioning pins of the double-pin perspective positioning part are in parallel and connected to the two sides of a receiver of a C-type arm X-ray unit through the upper end of a fixing rod, and the plane formed by the two positioning pins is located below the receiver and perpendicular to the plane of the receiver; the screw guiding part is an inverted-U-shaped frame, and a hollow sleeve and a guiding pin hole are formed in rod bodies on the two sides of the inverted-U-shaped frame respectively and opposite to each other. The implanting position of a guide pin can be determined through the double-pin perspective positioning part, and then the implanting positions of the screws are determined through the screw guiding part. The positions of the screws can be determined outside the human body, the three-dimensional positioner is easy to operate and use, simplifies the surgery process, shortens surgery time, provides a new method for fixing the sacroiliac joint in a minimally invasive mode and ensures that a surgery achieves an ideal effect.