In　allusion　to　the　cable　tension　controlling　problem　in　the　parallel　strand　stayed-cable　construction,　on　the　basis　of　construction　techniques　of　applying　tension　loads　one　by　one,　the　mechanical　model　of　the　cable-girder-tower　in　the　process　of　construction　was　established.　With　the　equal　cable　tension　as　a　goal,　the　formula　was　deduced　with　the　method　of　forward-analysis,　which　could　be　used　to　calculate　the　initial　tension　of　each　strand　in　construction.　The　effect　of　temperature　variations　on　the　initial　tension　could　be　eliminated　by　using　the　formula　with　the　method　of　equivalent　tension.　Moreover,　a　method　was　proposed　to　measure　the　cable　tension　in　the　processes　of　construction　and　performing　the　function.　Finally,　the　practice　in　one　cable-stayed　bridge　in　the　north　indicated　that　1)　the　uniform　cable　tension　could　be　obtained　by　the　proposed　method;　2)　the　tension　error　range　of　whether　a　single　strand　or　the　whole　stayed-cable　was　within　5%,　and　the　result　could　meet　the　needs　in　construction　control;　3)　the　method　could　provide　reference　for　the　similar　stayed-cable　construction.