This　paper　aims　at　seeking　the　weak　positions　of　a　flexible　steel　frame　structure　used　for　industrial　purpose　and　enhancing　its　seismic　capacity　by　taking　measures.　First,　the　weak　positions　of　the　steel　frame　structure　were　analyzed.　Then,　the　validity　of　the　proposed　measures　was　verified　through　numerical　simulation.　The　seismic　response　of　the　retrofitted　structure　was　compared　with　that　of　the　original　one　in　simulation　duration.　The　results　obtained　in　this　study　show　that　the　supplementary　lateral　bracings　can　improve　the　seismic　performance　of　the　initial　structure　significantly.