Superhydrophobic　poly　(vinylidene　fluoride)　is　rapidly　prepared　by　KrF　excimer　laser　irradiation　at　room　temperature　in　ten　seconds.　The　results　show　that　the　water　contact　angle　on　modified　surfaces　can　be　increased　from　53°　to　approximately　170°.　The　morphologies　and　chemical　construction　of　the　modified　layer　before　and　after　excimer　laser　irradiation　are　analyzed　with　atomic　force　micrograph(AFM)　and　X-ray　photoelectron　spectrometry(XPS).　It　is　observed　that　a　well　3D　net-like　microstructure　is　formed　gradually　on　modified　area,　and　the　groups　of　C-CF2　and　C-F　become　the　subject　of　modified　layer　instead　of　CH2　and　CF2.　It　is　concluded　that　the　effect　of　surface　roughness　increased　and　surface　energy　reduced　together　contribute　to　the　observed　superhydrophobic　property　of　modified　poly　(vinylidene　fluoride).