The ZCNJG-21 lever type torque verification device consists of a force measuring lever, weights, trays, steel strips, and connecting square tenons. It is to fix the torque testing head of the torque meter on the testing platform, connect the force measuring rod to the torque testing head with a connecting square tenon, and apply force to one end of the force measuring lever through a steel strip, tray, and weight, so that the torque testing head generates torque to achieve torque verification and calibration.