Prestressed clamping plate

The utility model discloses a prestress clamping plate. The device comprises a pressurizing device and a fixing device, the pressurizing device comprises a first counter-force steel plate, a jack pressure head, a pressure sensor, a guide rod, a cylindrical rigid base and a second counter-force steel plate; a jack pressing head is arranged on the lower surface of the first counter-force steel plate, four guide rods are fixedly installed at the positions, close to the outer side of the jack pressing head, of the lower end of the first counter-force steel plate, second counter-force steel platesare connected to the lower ends of the guide rods, and cylindrical rigid bases are arranged on the positions, close to the upper surfaces of the second counter-force steel plates, of the inner sides of the guide rods. According to the utility model, a designed prestress is applied to a research object through the pressurizing device; the device is simple in structure, safe, stable, easy to operate, capable of accurately m