LLDPE/ LDPE (75 : 25, W/ W) and wollastonite were used as the substrate and inorganic stuffing respectively to prepare fresh-keeping film of different treatments and different additives. The results showed that with the increase of added wollastonite amount, the tensile strength and elongation at break of the film decreases gradually, but oxygen rate and moisture content of the untreated film is improved a lot; the coupling agent and acid treatment improves the compatibility between wollastonite and the resin; the tensile strength and elongation at break of the treated film were better than the untreated, and oxygen rate and moisture permeability quantity are also improved obviously compared with the blank film.