Abstract:The national standards about main testing methods for automobile fuel tank were explained.The overall scheme of the test-bed design was put forward, and the structure and control system of the test bed were designed.The functions and the operation processes of the plastic fuel tank test-bed were introduced.The fuel tank cap seal test, opening pressure test of safety valve and pressure test could be completed, the test-bed could be used to simulate actual working conditions of automobile fuel tank.The validity and reliability of the test-bed design are verified with practical project, and the test-bed attains the anticipative effect.