Based　on　the　04th　section　of　Beijing　Yanfang　line　subway　modular　construction,　this　paper　summarizes　the　shortcomings　of　the　traditional　pier　column　construction　and　introduces　the　construction　technology　of　pier　column　reinforced　bar　in　details;　as　well　as　analyzes　the　economy,　construction　period,　social　benefits　generated　by　the　application　of　modular　construction.　The　engineering　practice　indicates　that　modular　construction　can　effectively　shorten　the　construction　period,　reduce　project　cost　and　improve　the　quality　of　the　project,　and　achieve　good　results　in　the　practical　application,　and　will　be　one　of　the　developing　directions　of　construction　industrialization　in　the　future.　©　2016　Taylor　&　Francis　Group,　London.