Research conclusions: According to the research，it can be drawn:(1)When the new tunnel under wear both tunnel， can through the adoption of forepole controlled blasting and ensure the safety of the tunnel construction safety and existing lines.(2)New super small clear distance tunnel across both the tunnel，in the case of clearance limit llowed， can through the tunnel reinforcement and grouting behind the lining，by improving the existing tunnel structure to ensure the safety of the existing tunnel. ( 3) For the proposed subway down through the tunnel under construction，the proposed subway can be applied through the tunnel under construction for auxiliary measures can be applied in advance for interchange effect，reduce the influence of the planned tunnel on existing tunnel，ensure safety. ( 4)For two proposed tunnel，when the first a lower tunnel construction，should be considered in the late on across the tunnel construction load and operating load，the influence of the primary support and secondary lining consider appropriate to strengthen. (5)When across the tunnel on the early construction，priority and tunnel construction during this period，reduce the wear on the tunnel construction on across the influence of the tunnel. (6)This research result can be applied in tunnel near the design of the tunnel section.