RO membrane module system and operation method

The invention provides an RO membrane module system and an operation method. Liquid enters a high-pressure pump through a feeding pump; under the action of the high-pressure pump, the liquid enters anRO membrane module to obtain reverse osmosis produced water and reverse osmosis concentrated water; and under the condition that the feeding pump continues to operate, the high-pressure pump is stopped for a period of time, and a membrane layer in the RO membrane module is flushed. By utilizing the principle of a reverse osmosis membrane, the pollution of the RO membrane module can be effectivelydelayed, and the chemical cleaning period of the RO membrane module is prolonged by 1.5-2 times. The chemical cleaning period of the RO membrane module is prolonged so that the cost of chemical agents for cleaning the RO membrane module is reduced, the long-time stable operation of the system is ensured, the enterprise investment cost can be effectively reduced, and energy conservation and emission reduction are realized