An efficient test bed of the electric-hydraulic proportional pump control motor system comprises a test bed measurement and control system, a pump control motor system, an electric-hydraulic proportional servo system, an oil replenishing system, a cooling system, a resistance loading system, an engine, an electromagnetic clutch and a speed raising box. The test bed measurement and control system calculates the input power and the output power of the pump control motor system by measuring the rotating speed and the torque at the input end and the output end of the pump control motor system so that the efficiency value of the pump control motor system can be obtained. The efficiency test bed of the electric-hydraulic proportional pump control motor system has the advantages that system oil supply pressure is stable and precise, the static and dynamic performance of the test bed is improved, and the test bed has more operability and the reliability; the resistance loading system is simple and practical, and the controllability is excellent; the oil temperature is adjusted through the test bed measurement and control system, energy consumption can be better lowered, the efficiency is improved, and the precision of test data is also greatly improved.