The research and development of a blasting test system are carried out to test the durability of the fuel tank under alternating pressure, which is used for a plastic fuel tank production line. The system was taken of Siemens S7-200 Programmable Logical Controller (PLC) as the core component, cooperating with high-pressure gas source, water tank, flowmeter, proportional valve, pressure sensor and other components. Various performance indexes of different types of fuel tank could be tested, as setting different test parameters through touch screen. The tank blasting tester could be realized of multi-mode blasting tests, for example standard pressure test, blasting pressure test, trapezoidal pressure test and stepped pressure test. The blasting test system can carry out detection for various working conditions of the fuel tank, which is convenient to improve the design and manufacturing of the fuel tank.