The　Beam　String　Structure　was　in　short-side　direction.　This　paper　simulated　Beam　String　Structure　in　long-side　direction.　Through　SAP2000　analysis　of　vibration　mode　and　stress　of　single　and　overall　structure,　some　features　of　the　structure　were　obtained.　The　single　structure　has　small　rigidity　disadvantage,　while　the　overall　structure　has　reasonable　stiffness.　Then　the　paper　draws　a　conclusion　that　disadvantage　in　long-side　direction　can　be　remedied　by　overall　structure.