The invention discloses a testing bed for electric vehicle detection and regenerative brake energy quantitative research, which comprises a tested vehicle model and a data acquiring and control system. The tested vehicle comprises a power battery, a motor controller, a motor, a power clutch, a gear box, a power break, a driving shaft, wheels, a vehicle inertia simulator, a brake simulator, an acceleration simulator, an electric energy regenerator and a road condition simulator, wherein the motor controller, the motor, the power clutch, the power brake, the driving shaft, the wheels, the vehicle inertia simulator, the brake simulator, the acceleration simulator, the road condition simulator and the electric energy regenerator are connected with the data acquiring and control system electrically. The testing bed has the following advantages of simple and reasonable structure, capability of detecting performance and regenerative brake energy during brake of the electric vehicles and practical value for design of the electric vehicles.