The invention provides a gas pressure monitoring system based on an optical fiber white-light interference measuring technology. The system comprises a white-light interference demodulator, an opticalfiber topology network and a gas pressure sensor set, the white-light interference demodulator comprises a white-light light source, a first optical fiber circulator, a second optical fiber circulator, a first optical fiber semi-reflecting mirror, a reflector, a first self-focusing lens, a stepping motor, a data acquisition card, a photoelectric detector and a computer, the optical fiber topologynetwork is formed by connection of optical switches or multiple channels of shunts in a tree-shaped structure, the gas pressure sensor set comprises a plurality of same gas pressure sensors, and eachgas pressure sensor comprises an elastic film, a reflective coating, a sensor housing, standard gas pressure inert gas, transparent glass, a second optical fiber semi-reflecting mirror and a second self-focusing lens. According to the gas pressure monitoring system based on the optical fiber white-light interference measuring technology, the gas pressure in a pressure container is monitored by employing the optical sensors so that the system is more applicable to pressure monitoring of gas pressure containers in severe conditions.