With the rise of the textile industry, the treatment of printing and dyeing wastewater has grown up to be a hot spot in the industry. The key is how to efficiently separate organic dyes and inorganic salts. Due to its loose membrane structure, the loose nanofiltration membrane has a high dye rejection rate and good salt permeability, which has unique advantages in the treatment of printing and dyeing wastewater. Article focuses on the research progress in the preparation of loose nanofiltration membranes by phase inversion. The effect of nanomaterial modification the performance of the prepared loose nanofiltration membranes. The existing problems are analyzed, and the future research direction of using phase inversion method to make loose nanofiltration membrane is prospected.