The invention discloses a zero-second falling-off gas supply connector testing system and testing method for the same. The zero-second falling-off gas supply connector testing system comprise a vibration unit, a falling off unit, a gas supply unit and a vibration sensor. The vibration unit comprises a pedestal and a vibration table installed on the pedestal. A connection plate is fixed on the upper end of the vibration table. An on-rocket interface equivalent tool is fixed on one end of the connection plate. The falling off unit comprises a fixed pedestal and a falling off air cylinder arranged on the fixed pedestal. An oil plug rod of the falling off air cylinder is connected to a dragging steel wire rope through a force measuring sensor. The gas supply unit comprises a gas supply device.The gas supply device is connected to the falling-off air cylinder through gas supply pipes of the air cylinder. The gas supply unit also comprises a plurality of gas supply pipes of a connector. Pressure meters are arranged above the gas supply pipes of the connector. The zero-second falling-off gas supply connector testing system is simple in structure, easy to use, safe and reliable. The testing method is easy to implement, reasonable in logics and high in reliability.