The invention discloses a clamping control device for a foil strip high-temperature tensile test. The device comprises a high-temperature tensile clamp with a square opening, wherein a sample is arranged at the middle part in the high-temperature tensile clamp; a pad is arranged between the sample and the inner wall on one side of the high-temperature tensile clamp; a step type pin penetrates in the lateral wall on the other side of the high-temperature tensile clamp, passes through the sample and the pad, goes out of the lateral wall on the other side of the high-temperature tensile clamp, and is fixed with a nut; and the sample is clamped by the shoulder surface of the step type pin and the pad on the other side. The clamping control device is convenient and easy in clamping, ensures close fit and better guarantees test result, so that the axial direction of the sample and the stress direction are consistent, system errors are reduced, the clearance between the sample and the pad is smallest, and the deformation degree of the pin hole of the sample is minimized.