The invention provides a multifunctional performance test bed for an electric vehicle. The multifunctional performance test bed comprises a test system, a tested system, a test bed supporting structure, a control system, a data collection system and an electric system. The test system comprises a power-measuring motor, a speed increasing device, a first flange plate, a torque sensor, a second flange plate, a bearing base, a third flange plate and an intrusiveness coupling which are sequentially connected. A tested gear shift executing mechanism is integrally arranged on the speed increasing device. The tested system comprises a gearbox and a tested motor which are connected with each other. A tested gear shift executing mechanism is integrally arranged on the gearbox. The test bed supporting structure comprises a base, a test system supporting part and a tested system supporting part. The control system comprises a power-measuring motor controller, a power-measuring control unit, a tested motor controller and a tested vehicle controller. By means of the multifunctional performance test bed, all the tests for testing the electric vehicle can be finished, the test system and the tested system are arranged on the test bed supporting structure through sliding blocks, and installation and movement are facilitated.