Non-road diesel engine post-processing system performance test device

The invention relates to the field of diesel engine tail gas after-treatment testing devices, in particular to a non-road diesel engine after-treatment system performance testing device which comprises a dynamometer control unit, a dynamometer, a diesel engine, a first proportional valve, an air supply unit and a particle generator. The dynamometer control unit sends signals to control the rotating speed and the torque of the dynamometer through the upper computer and the control circuit, the dynamometer transmits the torque to the diesel engine through the connecting shaft and the flange plate, and the air supply unit and the proportional valve are installed behind an exhaust pipeline of the diesel engine. Various factors influencing the post-processing efficiency are decoupled and one-dimensionally evaluated, so that the post-processing performance is more accurately evaluated, the post-processing model selection is not limited by the original arrangement of the whole machine any more, the post-processing m