Research conclusions: Through the research on the structure type of turnout continious girder in the station throat zone ON ballastless and jointless track，the control sectors of choice of the bridge structure style in the turnout zone were summarized．In order to design the structure that can meet the strength and deformation requirements of the turnout on ballastless and welded turnout，the attention should be paid to the followings：(1)The demands of the ballasfless and welded turnout to the bridge deformation and girder gap position should be confirmed．(2)According to the demands of the ballasdess and welded turnout to the relative transverse displacement of rail at the position of girder gap，the reasonable transverse arrangement of girders should be confirmed．(3)Based on the confirmed bridge structure style，an integrated ballasdess and jointless turnout—bridge—pier mechanical model should be established to calculate the working conditions of the track. girder and substructure in turnout zone．(4)The analysis of entire or partial girder should be made．