The invention relates to a disposable surgical drape film. The disposable surgical drape film is prepared from a material A and a material B by plasticizing co-extrusion, wherein the material A comprises components in parts by weight as follows: 100 parts of metallocene polyethylene resin and 0-5 parts of blue masterbatch; the material B comprises components in parts by weight as follows: 40-60 parts of SEBS resin, 60-40 parts of POE (polyolefin elastomer) elastic resin and 1-5 parts of blue masterbatch. Meanwhile, the invention provides a preparation method of the disposable surgical drape film. The surgical drape film has the advantages of low production cost, elasticity, good comfort, excellent barrier property and the like.