Mechanically-regulated catalysts can modulate catalytic behavior through ligand geometry change. The currently reported mechanocatalysts are only able to switch between “active” and “inactive” states. Here, we present work to develop a more sophisticated system that is capable of being switched among multiple states. Our current work focuses on investigating the effect of molecular-scale force on the kinetic rate of elementary steps in the catalytic cycle. A series of stiff stilbene-bisphosphine ligands with various strain force have been synthesized, to serve as force probes. The oxidative addition rates of palladium-bisphosphine system have been measured and analyzed.