Performance testing stand of gearbox synchronizer

The utility model discloses a performance testing stand of a gearbox synchronizer. The performance testing stand comprises a power supply, a control system and a base plate, wherein the base plate is provided with a first support plate mechanism and a third support plate mechanism; a motor base is fixedly arranged on the first support plate mechanism, and a driving motor is fixedly arranged on the motor base; a flywheel assembly and a transmission pedestal are fixedly disposed on the first support plate mechanism; a torque sensor device and a thin oil run-through supporting seat device are fixedly arranged on the transmission pedestal; an A-frame is fixedly disposed on the third support plate mechanism, a second support plate mechanism is fixedly disposed on the A-frame, and a to-be-tested gearbox is disposed on the second support plate mechanism; and, in respective to the base plate, the first support plate mechanism has freedom of motion in an X direction, the third support plate mechanism has the freedom of motion in a Y direction, and the second support plate mechanism has the freedom of motion in a Z direction. The testing stand provided by the utility model is applicable both to a horizontal gearbox of a passenger vehicle and a vertical gearbox of a commercial vehicle, and thus has positive practical significance.