Abstract: A linking rod clamping mechanism for connecting a coaxial connector with a printed circuit board includes a fine adjustment assembly that includes a cam and a screw to link with each other, an elastic assembly, and a connecting rod assembly consisting of at least two rectangular bodies. The positioning is achieved in a push manner by pushing the rotating handle down or lifting the rotating handle up, providing a stable structure, reliable operation, simple and quick operation. The linking rod clamping mechanism not only exerts an even force but also can determine the yield and decrease the adjustment time greatly. Furthermore, after the fine adjustment assembly is adjusted, the printed circuit board is clamped for performing a test. The same printed circuit boards in thickness can be quickly replaced and reused, thereby improving the yield and increasing the error tolerance.