By　means　of　experiment　and　simulation　method,　the　force　characteristic　of　the　control　valve　in　the　electronic　unit　pump　(EUP)　is　studied.　The　resultant　force　on　the　valve　is　obtained　based　on　its　displacement　data　acquired　through　test.　The　flow　field　is　simulated　with　the　computational　fluid　dynamics　(CFD)　method.　The　transient　inlet　and　outlet　pressure　measured　are　adopted　as　the　boundary　of　the　CFD　simulation.　The　experiment　results　show　that　the　resultant　force＇s　direction　is　consistent　with　that　of　the　valve　closing　at　the　end　of　valve　opening,　the　flow　influence　on　the　valve　mainly　reflects　in　the　static　pressure　and　flow　force,　especially　in　the　flow　force,　and　they　both　prevent　the　valve　from　opening.　The　flow　characteristic　around　the　valve　must　be　fully　taken　into　consideration　for　force　analysis　and　structure　optimization　of　the　control　valve.