Along with our country highway's development double arch tunnel construction technology for tunnel construction improve continously at high speed in the construction; taking two double archtunnel in Guilin for example， the author summarized longer connecting arch tunnel construction effec, the problems including the Earth Inclusion geology roof roof problems，analysis of anchor force principle were solved，and the traditional construction technology was also optimized; the construction of the double arch tunnel construction technology for further optimization and improvement had completed the whole set process development it could provide the reference for the later similar project construction.