Double-T beam has the advantages of convenient construction, convenient maintenance and maintenance, etc., and has been used more and more in practical projects as an alternative structure for hollow plate beam in recent years. However, the current research results are only suitable for the load action of highway-I/II and city-A/B grade, but many small and medium-sized bridges often have to bear the reaction of special load. Therefore, it is necessary to carry out the performance study of double-T beam under special load. Relying on a project in Shanghai, the finite element method is used to verify the using performance of the standard double-T beam structure under the special load. A strengthening scheme is proposed, calculated, compared and analyzed. Finally, a complete set of scheme is obtained, which provides reference for the design and construction of similar bridge structures.