The work aims to prepare a new type of cling film and explore its effect on fish preservation and goods holiday. A novel nanomaterial lactate intercalated hydrotalcite (MgAl-SL-LDHs) was prepared by intercalating sodium lactate into the laminate by ion exchange method. It was characterized by infrared spectrometer. A composite membrane was prepared with pectin as film-forming material, glycerol as plasticizer, calcium chloride as thickener, beeswax, span-40, Tween-80 viscous liquid as surfactant and MgAl-SL-LDHs as filling material. The tensile strength, elongation at break, light transmittance and water vapor permeability of the films were measured. The fish was wrapped in MgAl-SL-LDHs films with different mass concentrations and stored at 4 ℃, colony count and volatile base nitrogen were measured every 4 days. The optimum process for preparing the membrane was obtained by orthogonal test, added with a mass concentration of 2.5% pectin, 1% glycerol, 2% calcium chloride. Fish wrapped in 0.3% and 0.5% MgAl-SL-LDHs reached the national standard 6 lg (CFU/g) on the 14th day, the value of TVB-N on the 16th day did not reach the national standard 20 mg/hg. This kind of cling film has a certain effect in the preservation of carp, and it can extend the shelf life by about 6 days.