Washing method for organic matter pollution of reverse osmosis membrane system

The invention provides a washing method for organic matter pollution of a reverse osmosis membrane system. The reverse osmosis membrane system combines sterilization, alkali washing, acid washing andsterilization; meanwhile, a washing flow is finished by adopting a low-flow circulation, high-flow circulation, immersion, circulating washing combined washing manner; all properties of a reverse osmosis device can be immediately recovered through the washing method; the desalting rate and the capacity are recovered to a designed level, and the water-production conductance conductivity is less than 20us/cm; after washing is finished by the system, membrane fungicide is circulated in the system for 30min; the membrane fungicide with a certain concentration is also added in a running and medicine adding process, so that the growth of microorganisms, bacteria and the like is effectively inhibited; the reverse osmosis running time is prolonged and the number of times of membrane washing is reduced; the service life of