System and method for recycling ion exchange salt-containing washing water

The invention provides an ion exchange salt-containing washing water recycling system and method. The ion exchange salt-containing washing water recycling system comprises a low-salt washing water tank, a multi-salt washing water tank, a reverse osmosis device and an MVR (mechanical vapor recompression) evaporator, the low-salt washing water tank is used for collecting low-salt washing water; the multi-salt washing water tank is used for collecting multi-salt washing water; the reverse osmosis device is used for treating the low-salt washing water to obtain osmosis water and reverse osmosis concentrated water, the osmosis water is returned to the starch sugar ion exchange system for reuse, and the reverse osmosis concentrated water enters the multi-salt washing water tank; the MVR evaporator is used for treating the multi-salt washing water and the reverse osmosis concentrated water together to obtain distilled water and strong brine; wherein the distilled water returns to a starch sugar ion exchange system f