Research conclusions ： By means of introduction of technology along with independent innovation and on the basis of absorption and digestion of advanced foreign design concepts，a design method and design system of welded turnout on bridge have been established primarily, which can provides the basis for designing of welded turnout on bridge. The integrated calculation model of M Welded Turnout - Bridge 一 Pier t" presented in this paper can describe action between welded turnout and bridge in truth. This design method of welded turnout on bridge is very feasible and the research results can provide important guidance for the design and construction of welded turnout on bridge for Chinese passenger dedicated line.