After a certain steel structure landscape bridge was put into operation, when people walked to the mid-span position, they could obviously feel the bridge swaying laterally and needed to be reinforced. The article first introduces the current situation of the bridge from the layout of the bridge structure and the method of joints, and then uses Midas to build a model for analysis. The displacement calculation result of the model does not converge, and it is preliminarily judged that the structure system is unstable. The article proposes three reinforcement measures, transforming the hinged support into a fixed support, transforming the steel beam hinged connection node into a rigid connection node, adding support, and separately establishing models for analysis, and finally combining the actual situation on the site and the difference between theory and practice. , It is recommended to adopt the scheme of transforming the hinged joints of steel beams into rigid joints and increase the cross bracing of the main beams. The lateral shaking problem disappears after strengthening according to the scheme. Through the analysis of the bridge and the design of the reinforcement scheme, it has certain reference significance for similar projects in the future.