The utility model provides a large tonnage preformed double tension wire clamp. The wire clamp is composed of a triangular connecting plate, a Z type hanging plate, a lug shaft hanging plate which is connected with the top corner of the triangular connecting plate through the Z type hanging plate, ZS type hanging plates, U type connecting rings which are respectively connected with left and right bottom corners of the triangular connecting plate through left and right ZS type hanging plates and two groups of fixed preformed armor rods. Due to the fact that the triangular connecting plate is balancedly connected with two groups of fixed preformed armor rods, the tightness of two groups of fixed preformed armor rods which are connected with the same wire to be tensioned is highly consistent. The fixed preformed armor rods jointly bear the tension of the wire to be tensioned. The defect that the wire is insufficiently held and slips, which is caused by inconsistent tightness of two groups of fixed preformed armor rods which are connected with the same wire, of the existing preformed double tension wire clamp in use is effectively overcome. The wire clamp can bear large wire tension, so that the wire clamp is known as the large tonnage preformed double tension wire clamp. The wire clamp can be used to prevent the surface of the wire from damage caused by slippage and to eliminate hidden accident dangers, such as disconnection which is caused by slippage and threatens the safe operation of a line.