Based　on　the　evaluation　index　system　of　urban　circulation　power,　the　paper　does　comparative　studies　on　urban　circulation　power　of　the　cities　in　the　Western　Taiwan　Straits　Economic　Zone　by　means　of　factor　analysis.　The　paper　indicates　that　the　main　factors　which　influence　the　urban　circulation　power　can　be　reduced　to　scale　factor,　trading　factor　and　information　factor　and　holds　the　view　that　the　development　of　urban　circulation　power　is　unbalanced　between　cities　in　eastern　coastal　and　cities　in　inland　of　the　Western　Taiwan　Straits　Economic　Zone.　©　2010　ASCE.