The　evaporation　rate　of　asphalt　emulsion　is　critical　to　the　strength　development　of　asphalt　emulsion　materials.　Its　value　is　dependent　on　environmental　factors,　i.e.　relative　humidity,　temperature,　and　wind　speed.　However,　the　quantitative　relation　of　evaporation　rate　with　these　environmental　factors　are　unclear.　To　quantificationally　study　the　effect　of　environmental　factors　on　the　water　evaporation　rate　of　asphalt　emulsion,　a　computational　fluid　dynamics　(CFD)　simulation　model　of　water　evaporation　is　firstly　proposed　and　validated　by　experiment.　Then,　wide　range　of　environmental　factors　are　studied　in　the　CFD　simulation　model,　and　genetic　programmingbased　symbolic　regression　is　used　to　train　the　simulation　results　of　CFD　samples.　Finally,　a　relatively　accurate　prediction　equation　of　the　evaporation　rate　of　asphalt　emulsion　versus　environmental　factor　is　proposed,　and　the　sensitivity　of　the　water　evaporation　rate　under　the　three　environmental　factors　is　analyzed.　Results　show　that　the　evaporation　rate　can　be　accurately　simulated　by　CFD.　All　the　three　environmental　factors　can　greatly　affect　the　evaporation　rate　of　asphalt　emulsion,　while　their　effect　on　the　sensitivity　of　the　water　evaporation　rate　is　ranked　as:　temperature　＞　relative　humidity　＞　wind　speed.　To　ensure　an　acceptable　curing　period,　asphalt　emulsionbased　materials　should　be　avoided　to　be　paved　in　the　conditions　of　low　temperature　and　high　relative　humidity.