The invention relates to a binding post connecting structure for a stainless steel composite material grounding lead-up wire. The binding post connecting structure comprises a lead-up wire and a binding post, wherein the binding post consists of a steel rectangular plate arranged at the upper part and a steel cylinder arranged at the lower part, a center hole is formed in the bottom surface of the steel cylinder, the binding post is sheathed on the lead-up wire through the center hole, external screw threads are arranged on the steel cylinder of the binding post, a screw nut sheathed on the lead-up wire is connected onto the external screw thread part of the steel cylinder of the binding post through screw threads, the lower part of an inner hole of the screw nut has the conical degree, and three grasping claws are arranged between the screw nut and the lead-up wire. The binding post connecting structure has the advantages that the screw nut is used for fixing the lead-up wire and the binding post, the connection can be realized through adopting a general and ordinary tool, the requirement on a construction tool can be reduced, because the threaded connection is adopted, the mounting and the dismounting are convenient, the installation direction of the binding post can be freely changed, the fast and convenient connection with external electric equipment grounding bars in any directions can be realized, in addition, the test work is convenient, and because the three grasping claws are arranged in the screw nut, the connection reliability can be ensured.