本发明公开了一种硅烷改性聚四氟乙烯防水薄膜,它是由下述重量份的原料组成的:柠檬酸三丁酯2~3、聚四氟乙烯110~140、硅烷偶联剂kh5701~2、十二氟庚基丙基三甲氧基硅烷0.6~1、偶氮二异丁腈0.1~0.2、甲基丙烯酸甲酯6~8、丙烯酸3~4、双丙酮醇3~5、磷酸氢钙5~6、聚天冬氨酸0.7 The present invention discloses a silane modified polytetrafluoroethylene waterproof film, which is composed of the following raw materials in parts by weight: tributyl citrate 2 to 3, polytetrafluoroethylene 110 to 140, a silane coupling agent kh5701 ~ 2, dodecafluoropentylpropyl trimethoxysilane 0.6 ~ 1, azobisisobutyronitrile 0.1 ~ 0.2, methyl methacrylate 6 ~ 8, acrylic acid 3 ~ 4, diacetone alcohol 3 ~ 5, phosphoric acid Calcium calcium 5 to 6, polyaspartic acid 0.7