Concrete　pavement　slab　may　get　a　significant　built-in　curling　due　to　dry　shrinkage　and　built-in　temperature　gradient　at　its　initial　stage.　Here,　effects　of　built-in　curling　of　the　slab　on　dynamic　load　and　riding　comfort　of　vehicles　were　analyzed　based　on　a　quarter　vehicle　vibration　model　and　the　road-vehicle　dynamic　interaction　analysis　method.　The　results　showed　that　the　built-in　curling　has　more　effects　on　roughness　and　random　dynamic　load　of　a　higher-grade　pavement,　it　mainly　affects　road　roughness　and　vehicle　random　dynamic　load　parameters　related　to　frequency　of　(slab　length/speed);　built-in　curling　and　environmental　temperature　gradient　produce　upward　or　downward　curling,　slab　upward　curling　has　a　larger　influence　on　pavement　roughness　and　random　dynamic　load,　but　down　warping　has　little　effect;　riding　comfort,　pavement　grade,　vehicle　parameters　and　vehicle　speed　have　more　significant　effects　on　riding　comfort　than　built-curling　does.　Three-roll　shaft　construction＇s　built-in　curling　shape　has　a　stronger　effect　than　asiab＇s　built　in　curling　does;　effective　built-in　temperature　difference　keeping　below　-10　may　lead　to　a　good　performance　of　pavement　slab.　©,　2014,　Chinese　Vibration　Engineering　Society.　All　right　reserved.