In　this　paper,　strain　rate　effects　on　the　tensile　mechanical　properties　of　Polyethylene　Terephthalate　(PET)　fiber　bundles　at　room　temperate　were　studied.　First　of　all,　an　MTS　load　frame　together　with　an　Instron　drop-weight　impact　system　were　used　to　carry　out　the　tensile　test　under　the　quasi-static　(1/600s-1)　and　the　dynamic　loadings　(40,　80,　120　and　160s-1),　respectively.　The　dynamic　mechanical　properties,　consisting　of　the　tensile　strength,　peak　strain,　elastic　modulus　and　toughness,　were　analyzed　based　on　the　test　data.　It　was　concluded　that　the　tensile　strength　increases　with　strain　rate　while　the　peak　strain　and　toughness　decrease　with　the　strain　rate.　The　initial　elastic　modulus　remains　almost　unchanged　at　the　low　strain　rate　(no　more　than　40s-1)　and　starts　to　grow　when　the　strain　rate　is　beyond　40s-1.　The　second-stage　elastic　modulus　rises　continuously　with　the　strain　rate　from　1/600　to　160s-1.　Afterwards,　the　dynamic　tensile　strength　of　a　PET　fiber　bundle　was　statistically　analyzed　by　using　the　two-parameter　Weibull　distribution　model　that　can　help　to　quantify　the　scatter　of　the　dynamic　tensile　strength.　The　corresponding　parameters　can　be　added　into　a　numerical　simulation　in　future　to　reflect　the　different　tensile　strength　caused　by　defects.　©　2019　9th　International　Conference　on　Fibre-Reinforced　Polymer　(FRP)　Composites　in　Civil　Engineering,　CICE　2018.　All　Rights　Reserved.