The utility model provides a subway pantograph transverse rigidity measuring device which characterized in that: including main part support, laser displacement sensor, standard test weight, steel cable subassembly, locating wheel, laser displacement sensor, standard test weight are installed on the main part support, laser displacement sensor is used for measuring pantograph bow head position displacement and leaves, steel cable subassembly one end is fixed in the pivot of pantograph bow, and the other end is walked around the locating wheel and is hung the nominal weight, and pantograph frame and main part support pass through transverse connection subassembly fixed connection. The utility model discloses the ability is accurate, the rapid survey goes out pantograph lateral displacementdata, and measured data is accurate reliable. Simple to operate is swift, is fit for being used for runing car test xiu kunei and sets up pantograph transverse rigidity cyclic variation data report, the convenient maintenance and the maintenance.