The invention relates to the technical field of medical equipment, in particular to a pincer-type lower tibiofibular syndesmosis stability detector. The detector comprises a fibula holding assembly, apushing and mechanics measuring assembly, and a separation distance measuring assembly, wherein the fibula holding assembly comprises handles, connecting parts and clamping pipes, the handles are connected with the clamping pipes through the connecting parts, the clamping pipes are arranged in a hollow structure, and the clamping pipes are movably connected by a connecting mechanism to form a pincer-shaped structure, the pushing and mechanics measuring assembly comprises a force measuring cylinder, a piston rod and a spring, a pressure scale is arranged on the side wall of the force measuringcylinder, the separation distance measuring assembly comprises measuring rods, the measuring rods pass through the clamping pipes, and a ruler is arranged on each measuring rod. The detector enablesthe detection and diagnosis of the lower tibiofibular syndesmosis stability to be based on evidence, and enables a received-force size and separation distance of the lower tibiofibular syndesmosis tobe observed directly and concretely, so that the objectivity and accuracy of the lower tibiofibular syndesmosis stability detection are significantly improved.