Abstract: This article describes the nanofiltration and electrodialysis desalination progress and the difference. Dye electrodialysis desalination research was mainly carried out. A series of standard curves was done, including the dye concentration and conductivity curve, sodium chloride concentration and conductivity curve, dye concentration and absorbancy curve. The effects of dye desalination such as the dye concentration, the different salt concentration in dye, current, pH and flow were studied. The results show that different dye concentrations was the little effect on desalination, different salinity and currents were also little effect on desalination. Because dye has a certain degree of resistance, so to set a high current is no practical significance. If the current is set too small, there will be a constant current process in the beginning of the desalination process. Changes of pH and flow change only the desalination initial rate, affect not the final result of desalination.
