The utility model relates to a tunnel construction designs the field, discloses a tunnel intersection mouth advance support structure, I -steel frame, lock foot anchor pipe, a plurality of leading ductules, the steel pipe cuff of putting more energy into have been included, have adopted equitable little conduit length, the lap of splice, have executed and beat angle, horizontal spacing and slip casting parameter that be convenient for in narrow and small heng dong space construction, precision and grouting quality are beaten in executing of accurate control ductule, the ductule is squeezed into before stress redistributes, and the constraining effect of ductule provides a counter -force to the country rock to the self -stabilization capacity who keeps and strengthened the country rock, through the tunnel intersection mouth advance support structure of rational design, in excavation process, anchor power and ductule through leading ductule physically possess good tensile, shear behavior, have increased the friction of rock stratum structural plane, have strengthened the stability of country rock to the sliding failure between the bedding has been controlled effectively.