Porous filter membrane material for purifying waste salt solution and preparation method of porous filter membrane material

The invention discloses a porous filter membrane material for purifying a waste salt solution and a preparation method of the porous filter membrane material. The preparation method comprises the following steps: using a block polyether amide copolymer as a raw material, dissolving the raw material in an organic solvent so as to prepare a stock solution of a casting solution, adding deionized water to the stock solution of the casting solution so as to form a mixed solution, performing low pressure defoaming on the mixed solution so as to prepare the casting solution, coating the casting solution on non-woven fabric, putting the coated non-woven fabric in an oven, and after full evaporation of the organic solvent, putting the obtained non-woven fabric into pure water for solidification andfilm formation so as to obtain the block polyether amide porous filter membrane material. The invention provides a preparation process of the porous water treatment filter material, organic impurities and coke impurities in