The effects of different polymer materials covered with drip irrigation on cotton fields on soil water and salt were studied to provide a theoretical basis for guiding salt regulation in saline-alkali land and the application of polymer materials. This paper analyzes the effects of different treatments on soil moisture, salinity, and cotton by covering high-molecular multi-porous non-woven fabrics between membranes: polyester fiber（polyester PET）, polypropylene fiber（blue polypropylene） and polylactic acid fiber（PLA）. The research results show that:（1） Compared with non-covering measures, non-woven fabrics can reduce surface evaporation and increase soil moisture content between membranes, polyester PET has the best water retention effect after 60 days of coverage. The moisture content of the soil between the membranes increased by 34.95% compared with CK.（2） After using non-woven fabrics to cover the surface, the soil salt and Na⁺ content in the soils between membranes can be reduced to varying degrees.The effect of 0-20 cm soil layers is significant. The desalination effect is as follows: PET＞PP＞PLA＞CK, the highest PET desalination rate is 61.15%.（3） The yield of cotton treated with polyester PET is the highest at 5177.25kg/ha. The output of PLA is the lowest at 4568.19 kg/ha. The use of multi-porous non-woven fabrics covered between membranes reduces water evaporation and salt surface accumulation, improves the water and salt environment of crop growth, and the water retention and desalting effect of polyester PET is the best.