A series of fluorine-containing waterborne polyurethanes (CC-FPUF) were synthesized based on triazine-based fluorinated chain extender (CC-F) prepared from cyanuric chloride (CC), Octafluoropentanol(OFP) and ethanolamine(MEA). The structure of CC-FPUF was characterized by FTIR and 1H NMR. Effect of the content of the CC-F in CC-FPUF preparation (based on the total quality of CC-F, IPDI, CMA-1044, DMPA, S104, TMP and TEA, the same below) on particle size of CC-FPUF emulsions, polymer crystalline form, morphology, surface element composition, hydrophobic properties and mechanical properties of CC-FPUF latex films was investigated in detail by DLS, XRD, XPS, SEM, WCA and electronic universal testing machine. The results showed that the latexes size, hydrophobic properties and tensile strength of the CC-FPUF films increased gradually with the increase of CC-F content. It is worth noting that when the content of CC-F reached 8% (CC-FPUF-8), the water contact angle on the CC-FPUF film reached up to 125.8°, which was increased by 60.9° and 34.1° respectively compared with the fluorine-free PU film and the CC-FPUF-0 (the content of CC-F is 0) film. Meanwhile, the tensile strength of the film was the largest and 24.47 MPa higher than the CC-FPUF-0 film. So, the CC-FPUF-8 film exhibits excellent hydrophobic properties and good mechanical properties.